CN103199895B - A kind of audio frequency remote access and Play System - Google Patents
A kind of audio frequency remote access and Play System Download PDFInfo
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- CN103199895B CN103199895B CN201310007331.3A CN201310007331A CN103199895B CN 103199895 B CN103199895 B CN 103199895B CN 201310007331 A CN201310007331 A CN 201310007331A CN 103199895 B CN103199895 B CN 103199895B
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Abstract
A kind of audio frequency remote access and Play System, this system comprises audio source server and playback terminal; Described audio source server is used for depositing audio files; Described playback terminal is for playing audio files; Described playback terminal obtains sound source data by active request from audio source server and carries out decoding broadcasting; Communicated by high-speed power carrier communication mode between described audio source server with described playback terminal.The present invention can utilize the existing power line in place to carry out installation system, does not need rewiring, improves installation effectiveness, and saves user cost.
Description
Technical field
The present invention relates to a kind of system controlled by power line transmission audio frequency signal and to access and the broadcasting of audio signal.
Background technology
Along with the raising of life, people become an indispensable part in life gradually for the hobby of music, at home, in hotel, in other public places, not only wish to hear music whenever and wherever possible, also wish can enjoy the music oneself liked easily.
Current building audio system has and adopts tone frequency channel wire connection scheme, also has the less radio-frequency scheme of adopting.They have respective defect: adopt tone frequency channel wire connection scheme will again draw very long line when actual arrangement, also want external attached power supply adaptor, once shift one's position, rearrange again, very inconvenient.There is radio-frequency radiation in the less radio-frequency scheme based on RF-wise such as WIFI, ability through walls is more weak on the other hand, can not cover each corner on the one hand.
In field of signal transmissions, favourable power line carries out the technology of transfer of data, such as CN101707571A.The advantage using power line is the problem that can solve bracing wire again, and it does not have the delay in wireless communication technology, covers without dead angle, without radio-frequency radiation, etc.But this technology is not also used in building audio transmission system at present, so fail to solve the problem of rewiring in audio system.Reason is the technical problem needing to solve each side such as stored program controlled, method and equipment.
Summary of the invention
The present invention is directed to the technical problem existed in above-mentioned background technology, propose a kind of audio frequency remote access and Play System.
The technical problem that the present invention solves comprises: the place needing playing audio-fequency data at house or office building etc., makes full use of existing power line and carry out transmission of audio signal, and realizes remote access and the broadcasting of audio frequency.
Technical scheme of the present invention is as follows:
A kind of audio frequency remote access and Play System, this system comprises an audio source server, one or more playback terminal; Described audio source server is used for depositing audio files, and it comprises power module, central processing module, memory module, high-speed power carrier module, interactive module; Described playback terminal is for playing audio files, and it comprises power module, central processing module, high-speed power carrier module, audio coding decoding module; Described playback terminal obtains sound source data by active request from audio source server and carries out decoding broadcasting.
Wherein, described playback terminal also comprises Audio Input Modules, and described Audio Input Modules inputs sound source data from outside.
Wherein, external voice input is carried out encoding and is outputted to audio source server preservation by described playback terminal.
Wherein, described power module is ACDC power module.
Wherein, described audio source server and described playback terminal are by power line transmission data.
Wherein, on the zero line that described audio source server and described playback terminal are connected respectively to power line by respective two-pin plug and live wire, described electric power realizes the transmission of voice data.
Wherein, power line is that the place of installing described system possesses.
Wherein, described power line is arranged together with described system.
Wherein, described playback terminal also comprises device control module, and described device control module embeds for controlling the equipment installing playback terminal, and described equipment is selected from the plurality of devices comprising socket, electric light.
Wherein, described system also comprises one or more intelligent remote control device, and described remote control equipment controls playback terminal.
Wherein, described playback terminal comprises infrared transceiver module.
Wherein, described playback terminal comprises power amplifier module and loudspeaker.
Wherein, described audio source server optionally comprises playback terminal for realizing the module play.
Wherein, described playback terminal optionally comprises audio source server for realizing the module of access service function.
Wherein, described audio source server and described playback terminal are arranged on the diverse location in place.
Wherein, described audio source server is located at parlor, and described playback terminal is located at parlor, toilet, kitchen and/or bedroom.
Wherein, described audio source server is located at control room, and described playback terminal is located at office, resident house and/or workshop.
Beneficial effect of the present invention is:
Equipment is powered by the present invention, devices communicating integrates, and the music oneself liked is play in the place that user can arrive at family any one electric wire, can external also can be built-in, solve the wiring difficult problem that traditional redundancy is numerous and diverse; Meanwhile, the function of access and speech talkback mutually between signal light control, each terminal can also be realized.
Present system adopts electric force carrier transmission, what transmit is audio data file, data are by TCP mode transmitting, meeting autonomous retransmission after loss, ensure that audio data file accurately passes to opposite end, compared to traditional analog signal transmission mode, the problem of signal attenuation distortion during owing to there is not transmission, play quality is high.
Audio source server of the present invention and playback terminal size little, save 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 infrared receiving/transmission chip and the attached device of periphery thereof, reduces cost.
Accompanying drawing explanation
Fig. 1 is the system connection diagram of the embodiment of the present invention.
Fig. 2 is the audio source 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 electric power line end crosses of the embodiment of the present invention
Fig. 5 is the ACDC of the embodiment of the present invention.
Fig. 6 is the intelligent remote 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 of the UART reception infrared data of the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail, to make object of the present invention, technical scheme and effect clearly, clearly.Specific embodiment described herein only 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 based on power line and Play System, system utilizes existing power line, and collecting system is powered and is in communication in one.This system comprises power line, audio source server, multiple rooms playback terminal, a multiple intelligent remote control device.
Power line comprises a zero line and a live wire.Audio source server and room playback terminal are all be connected on two lines of power line by two-pin plug, and thus, playback terminal can be connected with audio source server by power line and to communicate.Described remote control equipment controls playback terminal.
As shown in Figure 2, audio source server comprises ACDC power module, central processing module, memory module, high-speed power carrier module, interactive module.As shown in Figure 2, wherein ACDC power module is responsible for AC conversion to become direct current to each model calling mode, is supplied to other several modules and uses; Central processing module is the core of audio source server, be responsible for the work of the whole audio source server of scheduling, memory module, high-speed power carrier module and interactive module are all its accessory module, memory module is the memory device for depositing audio files, high-speed power carrier module be responsible for resolving data on power line or data coupling on power line, interactive module is used for accepting subscriber control information and shows audio source server state information; Described audio source server responds the request of described playback terminal, sends voice data and accepts voice data to playback terminal or from audio source server.
The ACDC power module of audio source server adopts flyback power supply switching circuit, and switching circuit structure as shown in Figure 5.AC inputs 85V-265V alternating current, and standard input 220V alternating current, by current rectifying and wave filtering circuit, becomes alternating current AC into direct current DC, direct current input high frequency transformer primary input terminal; Pulse width modulator circuit controls high frequency transformer primary input terminal to the energy transferring of secondary output end, and become galvanic current through filtering high-frequency rectifier, galvanic size carries out FEEDBACK CONTROL by the reference circuit part of pulse width modulation circuit.Realizing circuit single channel of the present invention exports direct current 11.4V, then is depressured to 3.3V to whole circuit supply by 11.4V, gross output 5W.ACDC module adopts the isolation feedback circuit of benchmark pressurizer and isolation photoelectrical coupler composition, ensures that 11.4V is stable export by the output of stable benchmark.Current rectifying and wave filtering circuit is made up of diode and electric capacity, diode rectification, alternating current is become the direct current of pulsation; Electric capacity is responsible for filtering, the alternating component in direct current is filtered, and reduces alternating component; Rectifier filter circuit is made up of diode, inductance and electric capacity.
The central processing module of audio source server adopts Cortex-M3 arm processor to process the data of whole circuit, controls other module work.
The memory module of audio source server deposits the module of audio file, such as, can be TF card, USB flash disk etc.Central processing module utilizes 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 in network address.
The high-speed power carrier module of audio source server is made up of AFE (analog front end) modem chip and digital back-end process chip.When data receiver, AFE (analog front end) modem chip is responsible for data-signal to be out then delivered to the process of digital back-end chip from demodulation power line, sends to central processing module to resolve finally by MII mouth; When data send, data are sent to the process of digital back-end chip by MII mouth by CPU, then pass to analog front-end chip and are modulated on power line.The modulation /demodulation of data-signal is transformer coupled on power line by power line carrier.
The process chip of central processing module is directly connected by MII interface with the digital back-end chip of high-speed power carrier module, and central processing module is operated in MII MAC pattern, and high-speed power carrier module is operated in MII PHY pattern.This mode of operation, compared with the RJ45 connected mode of conventional electric power cat, eliminates two cover PHY, two cover network transformers and two RJ45 mouths and the attached devices of periphery.
High-speed power carrier module and the ACDC power module of audio source server cross at the end of equipment, and annexation as shown in Figure 4.The HF noise signal produced during ACDC module work is coupled on power line, with the data-signal superposition of high-speed power carrier module transmission, the direct accuracy affecting transfer of data, damage device at power input for preventing surge simultaneously, need to connect safety electric capacity, the capacitive of this electric capacity can cause the signal of communication distortion of being coupled to power line, whole transmission line bandwidth is brought to decline, so in end two modules that cross by isolation inductance L 1, L2 isolates, namely on the zero line and live wire of signal end and power end, respectively add the inductance of 10uH a to 100uH, isolate out ACDC module produce noise and safety electric capacity on the impact of data on power line.
The interactive module of audio source server adopts eight key capacitance touch chips.Described interactive module can also comprise touch key-press and LCM LCDs, directly controls audio source server to facilitate user instead of is controlled 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 Input Modules, power amplifier module and loudspeaker, also optionally can comprise device control module.Wherein ACDC module, central processing module, high-speed power carrier module function and occupation mode consistent with audio source server, audio coding decoding module, device control module, infrared transceiver module is also the accessory module of central processing module, the Code And Decode of audio coding decoding module primary responsibility 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 by audio decoder and is amplified the broadcasting of driving loudspeaker, Audio Input Modules can External microphone, the voice signal of intercommunication enters audio coding decoding module to carry out coding transmission to the other end and can output to audio source server and preserve.Device control module can control the equipment of embedding playback terminal as the power supply of socket, light fixture etc.
The ACDC power module of playback terminal adopts flyback power supply switching circuit, operation principle is the same with server end ACDC module, a primary input terminal and two secondary output ends are established unlike high frequency transformer, realizing circuit doubleway output direct current 11.4V and 3.3V, gross output 12W, isolation feedback circuit is set to 3.3V mono-tunnel, ensure that 3.3V is stable to export, output is followed on 11.4V mono-tunnel, its actual output voltage along with load variations fluctuation very large, in this terminal, 11.4V mono-tunnel provides power supply for analog front-end chip and power amplifier chips, along with the difference of mode of operation, load variations will be very large.For ensureing stable output, at each reserved nH level inductance of transformer secondary output output, for adjusting secondary leakage inductance, reach the object reducing 11.4V output error.
The central processing module of playback terminal also adopts 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 SPI interface, the Code And Decode of primary responsibility voice data, can to decode the audio file of the forms such as MP3, WAV, audio coding decoding module it also have two accessory module: power amplifier module and audio frequency input, power amplifier module is responsible for the voice signal after by audio decoder and is amplified the broadcasting of driving loudspeaker, this power amplifier can drive the loudspeaker in 4,8 Europe, more than power 6W.Audio Input Modules can External microphone, and the voice signal of intercommunication enters audio coding decoding module to carry out coding transmission to the other end and can output to audio source server and preserve.
The lighting control module that selectivity comprises is when playback terminal is connected with lamp, for controlling light.It adopts solid-state relay, and this solid-state relay inside adopts controllable silicon electronics to switch, and can not produce electric spark, long service life during work.
Infrared transceiver module utilizes central processing element simulated implementation, and 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 remote control device is the auxiliary equipment controlling room playback terminal, and Main Function is for man-machine interaction, for sending control command and the information that displays the play.It is primarily of MCU processing module, LCD MODULE, infrared transceiver module composition.MCU selects AVR Mega16, and infrared receiving/transmission is by MCU UART simulated implementation, 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 power line adopt RT-Thread RTOS exploitation, utilize the file system of this system and ICP/IP protocol stack to complete reading and the transfer function of file.
This operating system comprises: be used for driving the bottom hardware driver module of bottom hardware; The board suppot package relevant with circuit board with CPU; Cover the Realtime Operating System Nucleus module of full preemptive type; With the upper application module that bottom specific implementation is irrelevant.Bottom hardware comprises the usual hardware modules such as CPU, SRAM, UART, and board suppot package relates to the software-driven of different hardware, and kernel comprises the process 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, audio source server program module, playback terminal program module.
Wherein, audio source server program module is mainframe program module, is to read audio file data from the TF card of FAT file system, transfers data to AR7400 by the MII interface of STM32F107, be sent to addressing from machine.This mainframe program module sets up UDP server, is transferred to audio file data from machine by UDP mode.
The main design thought of audio source server program module is as follows:
1. initialization files system and ICP/IP protocol stack.
2. use UDP mode to set up 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 category, 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 and obtain voice data request.
Playback terminal program module is from machine program module, and it sets up the client computer of UDP, sends request according to the remote pilot of user to main frame simultaneously, thus obtains the audio file data of Host Transfer.After receiving audio file data from machine, buffer memory one bag data, are then sent to audio decoder chip by 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 UDP mode to set up 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 the operational order of user.
Main frame and all support command line configuration mode from machine, can be operated by the debug serial port on plate, some major functions all have the support of order line, convenient debugging.
The central processing element of playback terminal of the present invention and intelligent distant control itself all carries UART mouth, can realize the encoding and decoding of infrared data.Simulate 38KHz carrier wave with UART TX when sending data, serial ports is set to the baud rate of 115200, data bit is 7 bit, no parity check position and 1 stop bit, be 9 bit altogether, then send numerical value 0x5B continuously and just can obtain 38kHz, duty ratio is the carrier wave of 2/3.Drive with a PNP triode, what that delivered to infrared light emitting diode is exactly the carrier signal that duty ratio is 1/3.After sending data, baud rate is made into 9600, data bit changes 8bit into, utilize UART RX interrupting receive data, receive the software processing flow of data as shown in Figure 8, receiving in a complete infrared remote-controlled signal process, UART RX ceaselessly can enter interruption, whole process lasts is about 108ms, and the data of more than 33 can be sampled, so receiving in first opening timing device of having no progeny, timing 110ms, so looking in the time, if can receive more than 5 digital proofs, this is an effective infrared waveform instead of interference.If effectively just go to process all data received in 110ms, if it is the remote-control data of 1 that data bit 0 representative have received a bit, if data bit is not 0, it is the data of 0 that representative receives a bit.Then these bit bit combinations being got up is exactly the infrared decoding value received.
Audio frequency remote access based on power line of the present invention and Play System working method are substantially as follows: audio source server is used for depositing a large amount of audio files, audio coding decoding is operated in room playback terminal to carry out, user checks the source of sound list of audio source server by intelligent remote control terminal, selects to play.For ensureing to obtain the effectively correct of data, whole system communication adopts ICP/IP protocol, audio server end sets up UDP service, set up server processes for all online room playback terminals and service is provided, the data transport service of the corresponding playback terminal of each process, after the remote control request of room playback terminal identification user, obtain corresponding sound source data from audio source server, will decoding data be received and drive built-in loudspeaker to play through power amplifier module.
Should be understood that, those skilled in the art utilize ordinary technical knowledge and/or other prior art not to depart from the present invention's design to the alternative and modification that the present invention makes.
Claims (17)
1. audio frequency remote access and a Play System, this system comprises an audio source server, one or more playback terminal; Described audio source server is used for depositing audio files, and it comprises power module, central processing module, memory module, power line carrier module, interactive module; The switching circuit of the ACDC power module of audio source server, by rectifier bridge input rectifying, through high frequency transformer transformation, then through exporting High frequency filter, becomes direct current, and additional feedback circuit reaches DC stabilization and exports; Described playback terminal is for playing audio files, and it comprises power module, central processing module, power line carrier module, audio coding decoding module; Described playback terminal obtains sound source data by active request from audio source server and carries out decoding broadcasting; The power line carrier module of audio source server is made up of AFE (analog front end) modem chip and digital back-end process chip; When data receiver, AFE (analog front end) modem chip is responsible for data-signal to be out then delivered to the process of digital back-end chip from demodulation power line, finally sends to central processing module to resolve; When data send, data by sending to the process of digital back-end chip, then being passed to analog front-end chip and being modulated on power line by CPU; The ACDC power module of described audio source server adopts flyback power supply switching circuit, AC inputs 85V-265V alternating current, and standard input 220V alternating current, passes through current rectifying and wave filtering circuit, alternating current AC is become direct current DC, direct current input high frequency transformer primary input terminal; Pulse width modulator circuit controls high frequency transformer primary input terminal to the energy transferring of secondary output end, and become galvanic current through filtering high-frequency rectifier, galvanic size carries out FEEDBACK CONTROL by the reference circuit part of pulse width modulation circuit; Circuit single channel exports direct current 11.4V, then is depressured to 3.3V to whole circuit supply by 11.4V, gross output 5W; ACDC module adopts the isolation feedback circuit of benchmark pressurizer and isolation photoelectrical coupler composition, ensures that 11.4V is stable export by the output of stable benchmark; Described current rectifying and wave filtering circuit is made up of diode and electric capacity, diode rectification, and alternating current is become the direct current of pulsation, electric capacity is responsible for filtering, the alternating component in direct current is filtered, and reduces alternating component; Rectifier filter circuit is made up of diode, inductance and electric capacity; Described ACDC power module respectively adds the inductance of 10uH a to 100uH on the zero line and live wire of signal end and power end, isolates out noise and safety electric capacity that ACDC module produces to the impact of data on power line.
2. audio frequency remote access according to claim 1 and Play System, is characterized in that, described playback terminal also comprises Audio Input Modules, and described Audio Input Modules inputs sound source data from outside.
3. audio frequency remote access according to claim 2 and Play System, is characterized in that, external voice input is carried out encoding and outputted to audio source server and preserves by described playback terminal.
4., according to described audio frequency remote access arbitrary in claim 1-3 and Play System, it is characterized in that, described power module is ACDC power module.
5. audio frequency remote access according to claim 1 and Play System, is characterized in that, described audio source server and described playback terminal are by power line transmission data.
6. according to described audio frequency remote access arbitrary in claim 1-3 and Play System, it is characterized in that, on the zero line that described audio source server and described playback terminal are connected respectively to power line by respective two-pin plug and live wire, described power line realizes the transmission of voice data.
7., according to described audio frequency remote access arbitrary in claim 1-3,5 and Play System, it is characterized in that, power line is that the place of installing described system possesses.
8., according to described audio frequency remote access arbitrary in claim 1-3,5 and Play System, it is characterized in that, described power line is arranged together with described system.
9. according to described audio frequency remote access arbitrary in claim 1-3,5 and Play System, it is characterized in that, described playback terminal also comprises device control module, described device control module embeds for controlling the equipment installing playback terminal, and described equipment is selected from the plurality of devices comprising socket, electric light.
10., according to described audio frequency remote access arbitrary in claim 1-3,5 and Play System, it is characterized in that, described system also comprises one or more intelligent remote control device, and described remote control equipment controls playback terminal.
11. audio frequency remote access according to claim 10 and Play Systems, it is characterized in that, described playback terminal comprises infrared transceiver module.
12. according to described audio frequency remote access arbitrary in claim 1-3,5 and Play System, and it is characterized in that, described playback terminal comprises power amplifier module and loudspeaker.
13., according to described audio frequency remote access arbitrary in claim 1-3,5 and Play System, is characterized in that, described audio source server optionally comprises playback terminal for realizing the module play.
14. according to described audio frequency remote access arbitrary in claim 1-3,5 and Play System, and it is characterized in that, described playback terminal optionally comprises audio source server for realizing the module of access service function.
15. according to described audio frequency remote access arbitrary in claim 1-3,5 and Play System, and it is characterized in that, described audio source server and described playback terminal are arranged on the diverse location in place.
16. audio frequency remote access according to claim 15 and Play Systems, it is characterized in that, described audio source server is located at parlor, and described playback terminal is located at parlor, toilet, kitchen and/or bedroom.
17. audio frequency remote access according to claim 15 and Play Systems, it is characterized in that, described audio source server is located at control room, and described playback terminal is located at office, resident house and/or workshop.
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| CN101064854A (en) * | 2006-04-30 | 2007-10-31 | 华为技术有限公司 | Method for realization of scheduling data transmitting time |
| CN101399972A (en) * | 2007-09-28 | 2009-04-01 | 青岛海信电器股份有限公司 | Media center system and implementation method thereof |
| CN202094928U (en) * | 2011-06-10 | 2011-12-28 | 武汉长光科技有限公司 | Multimedia advertising recommending system based on electricity information acquisition system |
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| US7423992B2 (en) * | 2003-04-16 | 2008-09-09 | Sony Corporation | Time slot and carrier frequency allocation in a network |
| CN202339627U (en) * | 2011-10-31 | 2012-07-18 | 镇江比太系统工程有限公司 | Data acquiring and processing device with multiple communication manners |
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| CN101064854A (en) * | 2006-04-30 | 2007-10-31 | 华为技术有限公司 | Method for realization of scheduling data transmitting time |
| CN101399972A (en) * | 2007-09-28 | 2009-04-01 | 青岛海信电器股份有限公司 | Media center system and implementation method thereof |
| CN202094928U (en) * | 2011-06-10 | 2011-12-28 | 武汉长光科技有限公司 | Multimedia advertising recommending system based on electricity information acquisition system |
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