CN203012603U - Audio source server applied to remote audio access and play system - Google Patents
Audio source server applied to remote audio access and play system Download PDFInfo
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- CN203012603U CN203012603U CN 201320010055 CN201320010055U CN203012603U CN 203012603 U CN203012603 U CN 203012603U CN 201320010055 CN201320010055 CN 201320010055 CN 201320010055 U CN201320010055 U CN 201320010055U CN 203012603 U CN203012603 U CN 203012603U
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Abstract
The utility model relates to an audio source server applied to a remote audio access and play system. The audio source server comprises an ACDC (Alternate Current/Direct Current) power module, a central processing module, a memory module, a high-speed power line carrier module and an interaction module, wherein the memory module is memory equipment used for storing audio source files; the high-speed power line carrier module is used for analyzing data on a power line or coupling the data onto the power line; and the interaction module is used for receiving user control information. The audio source server responds to the request of a player terminal in the system and sends audio data to the player terminal. The system can be installed by utilizing the power line existing on site, and rewiring is not needed. The installation efficiency is improved, and the user cost is saved.
Description
Technical field
The present invention relates to a kind ofly by power line transmission sound frequently signal and system that access and the broadcast of sound signal are controlled, and relate in particular to a kind of source of sound server that is applied to remote audio access and Play System.
Background technology
Along with the raising of life, people become an indispensable part in life gradually for the hobby of music, at home, in the hotel, in other public places, not only wish to hear music whenever and wherever possible, also wish to enjoy easily the music of oneself liking.
At present the building audio system has and adopts the tone frequency channel wire connectivity scenario, and the less radio-frequency scheme of adopting is also arranged.They have defective separately: adopt the tone frequency channel wire connectivity scenario will again draw very long line when actual arrangement, also want external attached power supply adaptor, in case shift one's position, rearrange again, and very inconvenient.There is radio-frequency radiation on the one hand in less radio-frequency scheme based on RF-wise such as WIFI, and ability through walls is more weak on the other hand, can not cover each corner.
In field of signal transmissions, favourable technology of carrying out data transmission with line of electric force, for example CN101707571A.Using the advantage of line of electric force is the problem that can solve bracing wire again, and it does not have the delay in wireless communication technology, cover without the dead angle, and without radio-frequency radiation, etc.But this technology also is not used in the building audio transmission system at present, so fail to solve the problem of rewiring in audio system.Reason is the technical matters that needs to solve the each side such as stored program controlled, method and equipment.
Summary of the invention
The present invention is directed to the technical matters that exists in the above-mentioned background technology, propose a kind of source of sound server that is applied to remote audio access and Play System.
The technical matters that the present invention solves comprises: need the place of playing audio-fequency data at dwelling house or office building etc., take full advantage of existing line of electric force and come the transmission of audio signal, and realize remote access and the broadcast of audio frequency.
Technical scheme of the present invention is as follows:
a kind of source of sound server that is applied to remote audio access and Play System comprises ACDC power module, central processing module, memory module, high-speed power carrier module, interactive module, described ACDC power module is responsible for alternating current is changed into direct current, offering other several modules uses, described central processing module is the core of source of sound server, be responsible for the work of the whole source of sound server of scheduling, described memory module, described high-speed power carrier module and described interactive module are all the accessory module of described central processing module, described memory module is be used to the memory device of depositing audio files, described high-speed power carrier module resolve on line of electric force data or data coupling to line of electric force, described interactive module is used for accepting subscriber control information, the request of the playback terminal in the described system of described source of sound server response sends voice data to playback terminal.
Wherein, described source of sound server can be accepted voice data from described playback terminal.
Wherein, described playback terminal comprises the part that shows the source of sound server state information.
Wherein, the ACDC power module of source of sound server adopts the flyback power supply on-off circuit.
Wherein, the input AC electricity is 85V-265V.
Wherein, the input AC electricity is 220V.
Wherein, the alternating current of input through the high-frequency transformer transformation, then through the output High frequency filter, becomes direct current by the rectifier bridge input rectifying, and auxiliary feedback circuit reaches DC stabilization output.
Wherein, described high-frequency transformer is established a primary input terminal and a secondary output end, realizes circuit single channel output direct current 11.4V.
Wherein, alternating current is exported direct current 11.4V by the rear single channel of high-frequency transformer conversion of power module, then is depressured to 3.3V to whole circuit supply, gross output 5W by 11.4V.
Wherein, the isolation feedback circuit that the ACDC module adopts benchmark voltage stabilizer and isolation photoelectrical coupler to form guarantees the stable output of 11.4V by stable benchmark output.
Beneficial effect of the present invention is:
Adopt source of sound server of the present invention, power devices, devices communicating can be integrated, the user can play the music of oneself liking in the place that any one electric wire of family arrives, can be external also can be built-in, solved the numerous and diverse wiring difficult problem of traditional redundancy; Simultaneously, can realize also that light is controlled, the function of access and speech talkback mutually between each terminal.
System of the present invention adopts electric force carrier transmission, what transmit is audio data file, data are by TCP mode transmitting, meeting autonomous retransmission after loss, guarantee that audio data file accurately passes to the opposite end, than traditional analog signal transmission mode, due to the problem that does not have the signal attenuation distortion of when transmission, play quality is high.
Source of sound server of the present invention and playback terminal size are little, save the space, and conveniently connect and be embedded into other power equipment; And reduce costs.
Remote control equipment circuit of the present invention is simple, saves a pair of infrared receiving/transmission chip and peripheral attached device thereof, Cost reduction.
Description of drawings
Fig. 1 is system's connection diagram of the embodiment of the present invention.
Fig. 2 is the source of sound server principle schematic of the embodiment of the present invention.
Fig. 3 is the room playback terminal principle schematic of the embodiment of the present invention.
Fig. 4 is ACDC module and the connected mode of high-speed power module when the electric power line end crosses of the embodiment of the present invention.
Fig. 5 is the ACDC principle schematic of the embodiment of the present invention.
Fig. 6 is the intelligent distant control terminal principle schematic of the embodiment of the present invention.
Fig. 7 is the software systems hierarchical structure figure of the embodiment of the present invention.
Fig. 8 is the software flow pattern that the UART of the embodiment of the present invention receives infrared data.
Fig. 9 is the server workflow diagram of the embodiment of the present invention.
Figure 10 is the playback terminal workflow diagram of the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail, so that purpose of the present invention, technical scheme and effect are clearer, clear and definite.Specific embodiment described herein only is used for explaining the present invention, is not intended to limit the present invention.
As shown in Figure 1, a kind of audio frequency remote access and Play System based on line of electric force, system utilizes existing line of electric force, and collecting system is powered and is in communication in one.This system comprises line of electric force, source of sound server, a plurality of rooms playback terminal, a plurality of intelligent distant control equipment.
Line of electric force comprises a zero line and a live wire.Source of sound server and room playback terminal are all to be connected on two lines of line of electric force by two-pin plug, and thus, playback terminal can be connected with the source of sound server by line of electric force and communicate.Described remote control equipment is controlled playback terminal.
The source of sound server comprises ACDC power module, central processing module, memory module, high-speed power carrier module, interactive module.Each module connected mode as shown in Figure 2, wherein the ACDC power module is responsible for alternating current is changed into direct current, offers other several modules and uses; Central processing module is the core of source of sound server, be responsible for the work of the whole source of sound server of scheduling, memory module, high-speed power carrier module and interactive module are all its accessory module, memory module is be used to the memory device of depositing audio files, the high-speed power carrier module be responsible for resolving on line of electric force data or data coupling to line of electric force, interactive module is used for accepting subscriber control information and showing the source of sound server state information; The request of the described playback terminal of described source of sound server response sends voice data and accepts voice data to playback terminal or from the source of sound server.
The ACDC power module of source of sound server adopts the flyback power supply on-off circuit, the on-off circuit structure as shown in Figure 5, input 85V-265V alternating current, standard input 220V exchanges, by the rectifier bridge input rectifying, through the high-frequency transformer transformation, then through the output High frequency filter, become direct current, auxiliary feedback circuit reaches DC stabilization output.High-frequency transformer is established a primary input terminal and a secondary output end, realize circuit single channel output direct current 11.4V, single channel output direct current 11.4V after alternating current is changed by ACDC by its circuit of high-frequency transformer device of power module, be depressured to 3.3V to whole circuit supply, gross output 5W by 11.4V again.The isolation feedback circuit that the ACDC module adopts benchmark voltage stabilizer and isolation photoelectrical coupler to form guarantees the stable output of 11.4V by stable benchmark output.
The central processing module of source of sound server adopts the Cortex-M3 arm processor to process the data of whole circuit, controls other module work.
The memory module of source of sound server is to deposit the module of audio file, such as being TF card, USB flash disk etc.Central processing module utilizes the central processing element peripheral interface to go to read memory module and obtains voice data.Central processing module can also be connected to external ethernet by the RJ45 mouth of expansion, obtains and specifies audio file on network address.
The high-speed power carrier module of source of sound server is comprised of AFE (analog front end) modem chip and digital back-end process chip.The AFE (analog front end) modem chip is responsible for that then data-signal demodulation from the line of electric force out is delivered to the digital back-end chip and is processed when data receiver, sends to central processing module to resolve by the MII mouth at last; When data sent, CPU (central processing unit) sent to the digital back-end chip to process by the MII mouth data, then passes to analog front-end chip and is modulated on line of electric force.The modulation /demodulation of data-signal is transformer coupled to line of electric force by power line carrier.
The process chip of central processing module is connected the digital back-end chip directly by the connection of MII interface with the high-speed power carrier module, central processing module is operated in MII MAC pattern, and the high-speed power carrier module is operated in MII PHY pattern.This mode of operation is compared with the RJ45 connected mode of conventional electric power cat, has saved two cover PHY, two cover network transformer and two RJ45 mouths and peripheral attached devices.
The high-speed power carrier module of source of sound server and ACDC power module cross at the end of equipment, and annexation as shown in Figure 4.the HF noise signal that produces during the work of ACDC module is coupled on line of electric force, data-signal stack with the transmission of high-speed power carrier module, directly affect the accuracy of data transmission, damage device at power input for preventing surge simultaneously, need to connect safety electric capacity, the capacitive of this electric capacity can cause being coupled to the signal of communication distortion of line of electric force, bring whole transmission line bandwidth to descend, so pass through isolation inductance L 1 in two modules of end that cross, L2 isolates, namely respectively add a 10uH to the inductance of 100uH on the zero line of signal end and power end and live wire, isolate out noise that the ACDC module produces and safety electric capacity to the impact of data on line of electric force.
The interactive module of source of sound server adopts eight key capacitance touch chips.Described interactive module can also comprise touch key-press and LCM LCDs, to facilitate the user directly to the source of sound server controls rather than control by remote control equipment.
As shown in Figure 3, playback terminal comprises ACDC power module, central processing module, high-speed power carrier module, audio coding decoding module, infrared transceiver module, audio frequency load module, power amplifier module and loudspeaker, also can optionally comprise device control module.ACDC module wherein, central processing module, high-speed power carrier module function and use-pattern unisonance source server are consistent, the audio coding decoding module, device control module, infrared transceiver module is also the accessory module of central processing module, the audio coding decoding module mainly is responsible for the Code And Decode of voice data, it also has two accessory module: power amplifier module and audio frequency input, power amplifier module is responsible for the voice signal after audio decoder is amplified and is driven the loudspeaker broadcast, the audio frequency load module can external microphone, the voice signal of intercommunication enters the audio coding decoding module to carry out coding transmission to the other end and can output to the source of sound server preserving.Device control module can be controlled the equipment of embedding playback terminal such as the power supply of socket, light fixture etc.
the ACDC power module of playback terminal adopts the flyback power supply on-off circuit, principle of work is the same with server end ACDC module, different is that high-frequency transformer is established a primary input terminal and two secondary output ends, realize circuit doubleway output direct current 11.4V and 3.3V, gross output 12W, isolation feedback circuit is made as 3.3V one tunnel, guarantee the stable output of 3.3V, 11.4V one the tunnel is to follow output terminal, its actual output voltage is along with the load variations fluctuation is very large, 11.4V one tunnel provides power supply for analog front-end chip and power amplifier chips in this terminal, difference along with mode of operation, load variations will be very large.For guaranteeing stable output, respectively reserve a nH level inductance at the transformer secondary output output terminal, be used for adjusting secondary leakage inductance, reach the purpose that reduces 11.4V output terminal error.
The central processing module of playback terminal also adopts the Cortex-M3 arm processor to process the data of whole circuit, controls other module work.
The audio coding decoding module of playback terminal is connected with central processing module by the SPI interface, the main Code And Decode of being responsible for voice data, can the decode audio file of the forms such as MP3, WAV, it also has two accessory module the audio coding decoding module: power amplifier module and audio frequency input, power amplifier module is responsible for the voice signal after audio decoder is amplified and is driven the loudspeaker broadcast, this power amplifier can drive the loudspeaker in 4,8 Europe, more than power 6W.The audio frequency load module can external microphone, and the voice signal of intercommunication enters the audio coding decoding module to carry out coding transmission to the other end and can output to the source of sound server preserving.
The lighting control module that selectivity comprises is when playback terminal is connected with lamp, is used for controlling light.It adopts solid-state relay, and the inner controllable silicon that adopts of this solid-state relay switches with electronics, can not produce electric spark, long service life during work.
Infrared transceiver module utilizes the central processing element simulation to realize, UART_RX receives infrared data, and baud rate is that 9600, UART_TX sends infrared data, and baud rate is 115200.
As shown in Figure 6, intelligent distant control equipment is the utility appliance of controlling the room playback terminal, and Main Function is for man-machine interaction, is used for sending control command and the information that displays the play.It mainly is comprised of MCU processing module, LCD MODULE, infrared transceiver module.MCU selects AVR Mega16, and infrared receiving/transmission is by MCU UART simulation realization, and UART_RX receives infrared data, baud rate is 9600, UART_TX sends infrared data, and baud rate is 115200, receives broadcast information rear drive LCD MODULE LCM12864 and shows.
As shown in Figure 7, the audio frequency remote access and the Play System that the present invention is based on line of electric force adopt RT-Thread RTOS exploitation, utilize the file system of this system and ICP/IP protocol stack to complete reading of file and transfer function.
This operating system comprises: the bottom hardware driver module that is used for driving bottom hardware; The plate level support package relevant with circuit board with CPU; Cover the Realtime Operating System Nucleus module of full preemptive type; With the irrelevant upper application module of bottom specific implementation.Bottom hardware comprises the usual hardware modules such as CPU, SRAM, UART, and plate level support package relates to the software-driven of different hardware, and kernel comprises the processing such as device drives, Clock management, thread communication, management of process.Upper application module comprises ICP/IP protocol stack and multiwindow multithreading graphic user interface, source of sound server program module, playback terminal program module.
Wherein, source of sound server program module is the mainframe program module, is to read audio file data from the TF card of FAT file system, and the MII interface by STM32F107 transfers data to AR7400, sends to the slave of addressing.This mainframe program module is set up the UDP server, by the UDP mode, audio file data is transferred to slave.
The main design thought of source of sound server program module is as follows:
1. initialization files system and ICP/IP protocol stack.
2. use the UDP mode to set up the UDP server, set up a server thread for each client playing terminal.
3. search for all audio files under TF card, USB flash disk audio frequency catalogue, and numbering and log file name.
4. the command interaction agreement of initialization and client playing terminal.
5. wait for that client's client playing terminal sends the voice data request of obtaining.
The playback terminal program module is the slave program module, and it sets up the client computer of UDP, controls to main frame according to user's remote control simultaneously to send request, thereby obtains the audio file data that the main frame transmission comes.After slave was received audio file data, then buffer memory one bag data were sent to the audio decoder chip by the SPI interface, recover audio frequency by decoding chip.
The main design thought of room playback terminal is as follows:
1. initialization ICP/IP protocol stack.
2. use the UDP mode to set up the UDP client computer, set up a client process for server.
3. initialization audio coding decoding chip VS1003.
4. the command interaction agreement of initialization and server end.
5. wait for user's operational order.
Main frame and slave are all supported command line configuration mode, can operate by the debug serial port on plate, and some major functions all have the support of order line, convenient debugging.
Server process playback terminal solicited message of the present invention, its flow process is controlled as shown in Figure 9.Power on complete initialization after, open the UDP server DHCP service be provided, main frame is constantly monitored and is had or not new playback terminal to add on line of electric force or have the playback terminal request of data by controlling process timeslice.In case receive certain playback terminal information, to the information judgement of decoding, if the playing request of existing playback terminal, resolve IP and the concrete command information of this playback terminal, for this IP distributes the transmission process, transmit; If what receive is that a new playback terminal has added power line network to fruit, for the IP of this playback terminal free time of distribution and with this IP broadcast to other playback terminal on line of electric force.
Playback terminal flow process of the present invention is controlled as shown in figure 10.Power on complete initialization after, send the distributing IP Address requests to server, Receiving Host distributes the IP of a free time, then waits for the command request of other terminal on user or line of electric force; Analysis request content after the request of receiving, if what receive is user's exchange message, judge that this information is local control information (controlling as volume control, device power supply (DPS)) or far-end solicited message (as obtaining voice data from server), if local control information is directly processed by the machine CPU (central processing unit), if the far-end solicited message sends request command to main frame, wait for Receiving Host successive frame voice data.In receiving every frame data process, the request repeat if data check is incorrect.In the network of multiple terminals, simultaneously may there be a plurality of playing request, server is each terminal distribution transmission process, go to take turns flow transmission by timeslice, rather than wait for that a transmission finishes playing and pass again another, flow process control to be set 512 fixing byte Buffer of each terminal, often receives to pass to the audio coding decoding module after 512 bytes and go decoding to play, and allows simultaneously server transmission next frame.If the centre does not have other request command to interrupt, this transmission process goes on always.In case receive other playback terminal intercommunication request, respond this request, and set up transmission and connect, the voice data that the receives broadcast of decoding is if reply audio-frequency signal coding is transferred to the opposite end.
Itself all carries the UART mouth central processing element of playback terminal of the present invention and intelligent distant control, can realize the encoding and decoding of infrared data.Simulate the 38KHz carrier wave with UART TX when sending data, serial ports is made as 115200 baud rate, data bit is 7 bit, no parity check position and 1 stop bit, be 9 bit altogether, then send continuously numerical value 0x5B and just can obtain 38kHz, dutycycle is 2/3 carrier wave.Drive with a PNP triode, that delivers to infrared light emitting diode be exactly dutycycle be 1/3 carrier signal.After sending data, baud rate is made into 9600, data bit changes 8bit into, utilize UART RX to interrupt receive data, the software treatment scheme of receive data as shown in Figure 8, in receiving a complete infrared remote-controlled signal process, UART RX can ceaselessly enter interruption, whole process continues approximately 108ms, and can sample data more than 33, so the opening timing of having no progeny in receiving first device, timing 110ms, within the time of so looking, this is an effective infrared waveform rather than interference if can receive 5 above digital proofs.If effectively just go to process all data that receive in 110ms, be 1 remote-control data if data bit 0 representative has received a bit, if data bit is not 0 representative receives a bit is 0 data.Then these bit bit patterns being got up is exactly the infrared decoding value that receives.
Audio frequency remote access and Play System working method based on line of electric force of the present invention is substantially as follows: the source of sound server is used for depositing a large amount of audio files, audio coding decoding is operated in the room playback terminal to carry out, the user checks the source of sound list of source of sound server by the intelligent distant control terminal, select to play.For guaranteeing to obtain the effectively correct of data, ICP/IP protocol is adopted in whole system communication, the audio server end is set up the UDP service, set up server processes for all online room playback terminals service is provided, the data transport service of the corresponding playback terminal of each process, after room playback terminal identification user's remote control request, obtain corresponding sound source data from the source of sound server, play receiving decoding data and driving built-in loudspeaker through power amplifier module.
Should be understood that, those skilled in the art utilize ordinary skill knowledge and/or other prior art not to break away from the present invention's design to the alternative and modification that the present invention makes.
Claims (10)
1. a source of sound server that is applied to remote audio access and Play System, comprise ACDC power module, central processing module, memory module, high-speed power carrier module, interactive module, described ACDC power module is responsible for alternating current is changed into direct current, offering other several modules uses, described central processing module is the core of source of sound server, be responsible for the work of the whole source of sound server of scheduling, described memory module, described high-speed power carrier module and described interactive module are all the accessory module of described central processing module, described memory module is be used to the memory device of depositing audio files, described high-speed power carrier module resolve on line of electric force data or data coupling to line of electric force, described interactive module is used for accepting subscriber control information, the request of the playback terminal in the described system of described source of sound server response sends voice data to playback terminal.
2. source of sound server according to claim 1, is characterized in that, described source of sound server can be accepted voice data from described playback terminal.
3. source of sound server according to claim 1 and 2, is characterized in that, described playback terminal comprises the part that shows the source of sound server state information.
4. source of sound server according to claim 1 and 2, is characterized in that, the ACDC power module of source of sound server adopts the flyback power supply on-off circuit.
5. source of sound server according to claim 1 and 2, is characterized in that, the input AC electricity is 85V-265V.
6. source of sound server according to claim 5, is characterized in that, the input AC electricity is 220V.
7. source of sound server according to claim 5, is characterized in that, the alternating current of input through the high-frequency transformer transformation, then through the output High frequency filter, becomes direct current by the rectifier bridge input rectifying, and auxiliary feedback circuit reaches DC stabilization output.
8. source of sound server according to claim 7, is characterized in that, described high-frequency transformer is established a primary input terminal and a secondary output end, realizes circuit single channel output direct current 11.4V.
9. source of sound server according to claim 7, is characterized in that, alternating current is exported direct current 11.4V by the rear single channel of high-frequency transformer conversion of power module, then is depressured to 3.3V to whole circuit supply, gross output 5W by 11.4V.
10. source of sound server according to claim 9, is characterized in that, the isolation feedback circuit that the ACDC module adopts benchmark voltage stabilizer and isolation photoelectrical coupler to form guarantees the stable output of 11.4V by stable benchmark output.
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| CN 201320010055 CN203012603U (en) | 2013-01-09 | 2013-01-09 | Audio source server applied to remote audio access and play system |
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| CN 201320010055 CN203012603U (en) | 2013-01-09 | 2013-01-09 | Audio source server applied to remote audio access and play system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197739A (en) * | 2013-01-09 | 2013-07-10 | 北京卓越信通电子股份有限公司 | Sound source server applied to remote audio access and play system |
| CN108183728A (en) * | 2017-12-29 | 2018-06-19 | 武汉中仪物联技术股份有限公司 | A kind of outside Transmission system of confined space signal and method |
-
2013
- 2013-01-09 CN CN 201320010055 patent/CN203012603U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197739A (en) * | 2013-01-09 | 2013-07-10 | 北京卓越信通电子股份有限公司 | Sound source server applied to remote audio access and play system |
| CN108183728A (en) * | 2017-12-29 | 2018-06-19 | 武汉中仪物联技术股份有限公司 | A kind of outside Transmission system of confined space signal and method |
| CN108183728B (en) * | 2017-12-29 | 2021-03-02 | 武汉中仪物联技术股份有限公司 | Closed space signal outward transmission system and method |
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