CN105515800A - Internetwork based digital audio broadcasting system - Google Patents
Internetwork based digital audio broadcasting system Download PDFInfo
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- CN105515800A CN105515800A CN201510929964.9A CN201510929964A CN105515800A CN 105515800 A CN105515800 A CN 105515800A CN 201510929964 A CN201510929964 A CN 201510929964A CN 105515800 A CN105515800 A CN 105515800A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
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Abstract
The invention discloses an internetwork based digital audio broadcasting system. The internetwork based digital audio broadcasting system comprises a main control CPU (Central Processing Unit), an Ethernet transmitter-receiver device, an interface circuit, a power module, a network audio terminal and a sound acquirer. The internetwork based digital audio broadcasting system is characterized in that sound acquired by the sound acquirer is sent to the network audio terminal, the output end of the network audio terminal is connected with the main control CPU, the main control CPU is also respectively connected with the Ethernet transmitter-receiver device, the power module and a peripheral interface. The internetwork based digital audio broadcasting system has the following advantages that 1, as a specific network audio terminal is adopted as an audio processing module, the processing speed is fast, the operation is accurate, and the real-time transformation efficiency is increased; 2, as multiple information transmission interfaces are arranged, information transmission in different transmission routes is satisfied; and 3, as an uninterrupted power supply is adopted, the system stability is improved, and the practical service life of the system is prolonged.
Description
Technical field
The present invention relates to a kind of digital audio broadcast system, specifically a kind of digital audio broadcast system based on internet.
Background technology
Internet audio broadcasting technology is mainly used in large-scale common broadcast system, as the audio broadcasting in the buildings such as campus, theme park, coliseum, intelligent building, airport, subway.This technology mainly adopts Ethernet technology, audio signal is transmitted in ethernet networks with specific procotol, and thoroughly solve the tonequality existed in conventional broadcast system not good, be easily disturbed, maintenance management is complicated, the problems such as interactive poor performance.Simultaneously, multi-path constant is adopted to realize the intelligent management to radio program transmission and reception to technology such as addressing, walkthrough program Auto broadcast can be realized, select all, part or specific region carry out packet-oriented broadcast, grouping authorization calls and receives or force to receive, and breaches case of conventional analog broadcast system can only carry out public broadcasting limitation to Zone Full.
One large shortcoming of analogue audio frequency transmission is that the decay of audio signal level increases with the increase of transmission range, and make the high frequency response of the signal to noise ratio of signal and system worse and worse, the cross-talk between passage is increasing.Along with the increase of transmission range, the problem of both poor sound quality cannot overcome.In some projects, the scale of building is more and more huger, wide apart between each single building, may at a distance of youngster hundred meters or youngster's kilometer, according to analogue audio frequency line layout in the past, the wiring cost and the signal attenuation that reach youngster's kilometer will become engineering business very stubborn problem, and the centralized control of thing followed Public Address system, system monitoring are also difficult to solve, and are therefore badly in need of a kind of Digital Audio Transmission technology. can monitor self again by transmission of audio letter C7`J..
Summary of the invention
The object of the present invention is to provide a kind of digital audio broadcast system based on internet, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the invention provides following technical scheme:
A kind of digital audio broadcast system based on internet, comprise master cpu, Ethernet R-T unit, interface circuit, power module, network audio terminal and sound collector, it is characterized in that, described sound collector collects sound and sends into network audio terminal, the output of network audio terminal connects master cpu, and master cpu also connects too net R-T unit, power module and Peripheral Interface respectively.
As preferred version of the present invention: described network audio terminal comprises signal amplifier, decoder module, master controller, SRAM, FLASH, Ethernet chip, serial port module, display screen, indicator light and keyboard, signal amplifier receives the audio signal from sound collector and carries out amplification process to it, audio signal after amplification outputs in decoder module carries out decoding process, decoded chip is transported in master controller, and main controller also connects SRAM, FLASH, Ethernet chip, serial port module, display screen, indicator light and keyboard respectively.
As preferred version of the present invention: described power module comprises triode V1, diode D1, chip IC 5 and chip IC 6, it is characterized in that, the pin 1 contact resistance R11 of described chip IC 6, resistance R12, the anode of resistance R14 diode D1 and power supply VCC, the pin 2 of chip IC 6 connects electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, resistance R9, a stiff end of potentiometer RP4, the negative pole of storage battery E, the anode of diode D4 and the pin 1 of chip IC 5, the positive pole connecting valve S1 of storage battery E, the other end contact resistance R8 of switch S 1, a stiff end of potentiometer RP5, the anode of diode D2 and the emitter of triode V1, the other end of the base stage contact resistance R12 of triode V1 and resistance R13, the collector electrode tie point R10 of triode V1 and the other end of resistance R11, the other end of resistance R10 connects the negative electrode of diode D1, the other end of resistance R8 connects another stiff end of potentiometer RP4, the sliding end of potentiometer RP4 connects the pin 2 of chip IC 5, the other end of resistance R9 connects another stiff end of potentiometer RP5, the sliding end of potentiometer RP5 connects the pin 6 of chip IC 5, the negative electrode of diode D2 connects the other end of electric capacity C3, the other end of electric capacity C4, the pin 3 of chip IC 5 and master cpu, the other end of resistance R14 connects the pin 8 of chip IC 5, the pin 4 of chip IC 5 connects the other end of electric capacity C2 and the negative electrode of diode D4, the pin 5 of chip IC 5 connects the other end of electric capacity C1, the pin 7 of chip IC 5 connects the negative electrode of diode D3, the other end of the anode contact resistance R13 of diode D3.
As preferred version of the present invention: described Peripheral Interface comprises USB interface, HIDM interface and RS485 interface.
As preferred version of the present invention: described master controller is EP2C5FA484 type fpga chip able to programme.
As preferred version of the present invention: described indicator light is LED light.
As preferred version of the present invention: described display screen is 7 cun of LCDs.
Compared with prior art, the invention has the beneficial effects as follows: the digital audio broadcast system that the present invention is based on internet has the following advantages: 1, adopt the network audio terminal of specialty as audio processing modules, its processing speed is opened, and operation precisely, adds the efficiency of conversion in real time; 2, be provided with multiple information transmission interface, meet the confidence transmission of different route of transmission; 3, adopt uninterrupted power supply to power, increase stability and the physical life of system.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the digital audio broadcast system based on internet;
Fig. 2 is the structured flowchart of network audio terminal;
Fig. 3 is the circuit diagram of power module.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1-3, a kind of digital audio broadcast system based on internet, comprise master cpu, Ethernet R-T unit, interface circuit, power module, network audio terminal and sound collector, it is characterized in that, described sound collector collects sound and sends into network audio terminal, the output of network audio terminal connects master cpu, and master cpu also connects too net R-T unit, power module and Peripheral Interface respectively.
As preferred version of the present invention: described network audio terminal comprises signal amplifier, decoder module, master controller, SRAM, FLASH, Ethernet chip, serial port module, display screen, indicator light and keyboard, signal amplifier receives the audio signal from sound collector and carries out amplification process to it, audio signal after amplification outputs in decoder module carries out decoding process, decoded chip is transported in master controller, and main controller also connects SRAM, FLASH, Ethernet chip, serial port module, display screen, indicator light and keyboard respectively.
As preferred version of the present invention: described power module comprises triode V1, diode D1, chip IC 5 and chip IC 6, it is characterized in that, the pin 1 contact resistance R11 of described chip IC 6, resistance R12, the anode of resistance R14 diode D1 and power supply VCC, the pin 2 of chip IC 6 connects electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, resistance R9, a stiff end of potentiometer RP4, the negative pole of storage battery E, the anode of diode D4 and the pin 1 of chip IC 5, the positive pole connecting valve S1 of storage battery E, the other end contact resistance R8 of switch S 1, a stiff end of potentiometer RP5, the anode of diode D2 and the emitter of triode V1, the other end of the base stage contact resistance R12 of triode V1 and resistance R13, the collector electrode tie point R10 of triode V1 and the other end of resistance R11, the other end of resistance R10 connects the negative electrode of diode D1, the other end of resistance R8 connects another stiff end of potentiometer RP4, the sliding end of potentiometer RP4 connects the pin 2 of chip IC 5, the other end of resistance R9 connects another stiff end of potentiometer RP5, the sliding end of potentiometer RP5 connects the pin 6 of chip IC 5, the negative electrode of diode D2 connects the other end of electric capacity C3, the other end of electric capacity C4, the pin 3 of chip IC 5 and master cpu, the other end of resistance R14 connects the pin 8 of chip IC 5, the pin 4 of chip IC 5 connects the other end of electric capacity C2 and the negative electrode of diode D4, the pin 5 of chip IC 5 connects the other end of electric capacity C1, the pin 7 of chip IC 5 connects the negative electrode of diode D3, the other end of the anode contact resistance R13 of diode D3.
Peripheral Interface comprises USB interface, HIDM interface and RS485 interface.Master controller is EP2C5FA484 type fpga chip able to programme.Indicator light is LED light.Display screen is 7 cun of LCDs.
Operation principle of the present invention is: network digital voice frequency terminal constitutes a network through the network switch and server.In this Ethernet, all audio signals are distributed all mountain servers and are carried out, and the audio signal that play leaves in server with the form of digital audio file, and voiceband data signal is sent to each digital audio terminal by control software design by server respectively.On the other hand, digital audio terminal is provided with analog input/output interface, export and receive sound reinforcement system, and input interface can receive the signal from the multiple analog such as microphone, cD source of sound, through Internet Transmission to target number voice frequency terminal.The input (as microphone, cD source of sound etc.) of each digital audio terminal of server controls is assigned to target number terminal, but digitized audio message itself then transmits between the digital audio terminal of mountain voluntarily, and now server only plays coordinative role.Another effect of server is the integrity that timing detects all digital audio terminal, realizes redundancy backup and fault-toleranr technique.Mountain can adopt the various media such as optical cable in the connection of ethernet network, thus can realize transmission that is remote, high-capacity digital audio letter bow one.
For realizing network digital audio broadcasting, system physical structure adopts the topological structure (stelliform connection topology configuration, nebula topological structure etc.) of Ethernet, logically adopts primary and secondary structure.Main equipment (Control Server) is only, is used for coherent system work, and it provides master clock, namely sends a clock data frame by network, makes other equipment adjustment local clock in network.The mountain, road of audio signal is dispensing by packet numbers to realize, and each equipment has and sends the ability of certain fixed data Bale No., packet numbers tell main equipment in systems in which any two equipment to communicate.If an equipment will pass through network traffic, it first sends a request data frame to main equipment, and main equipment is by adding that in the Frame returned one allows field to ratify a motion.But if network bandwidth deficiency or same request are shared by other transmission, this request is by banned ratio or delay.
Audio format in the present invention and compression adopt external audio decompression chip VS1003, can realize WMA, the decompress(ion) of the forms such as MP3>WAV>MIDI, then directly use software simulating to the decompress(ion) of difference information.In the fullness of time, the IP of each decompression module directly can be encased in fpga chip inside. and by FP (' the field upgrade of TA chip realizes.
In actual applications, emergent broadcast (as the fire alarm) reliability requirement to system is higher, and broadcast system must adopt redundancy backup and fault-toleranr technique.Different from analogue technique, Internet Transmission is two-way, regularly can pass through network monitor all-network audio frequency apparatus, when systems axiol-ogy breaks down to any equipment or network cable, emergent switching can be carried out, guarantee system continues to run, and sends alarm signal simultaneously, asks engineer to note carrying out system maintenance.Control Server can adopt industrial computer or multiple-node backup mode, improves its reliability, and mountain its be responsible for timing and detect the operation conditions of each network audio terminal.
Network digital voice frequency terminal bears Internet Transmission and the encoding and decoding task of digital audio and video signals.Each voice frequency terminal built-in audio coding and decoding function, can be used as a voice frequency terminal as one piece of external network sound card, can place it in the place of any needs.Theoretically, as long as the place having network to arrive can increase arbitrarily network audio terminal, its quantity is unlimited.The operating state of all network audio terminals can be carried out separately or grouping monitoring in real time from the voice frequency terminal control software design of server, and software can give the alarm to the job failure of voice frequency terminal any in network automatically. and reporting system operator safeguard.
Master controller in network digital voice frequency terminal adopts the EP2CSFA484 fpga chip able to programme of ALTERA company CYCLONEII series and the audio decoder chip etc. of VLSISolutionOy company of Finland, realizes the PIO etc. of the embedded 32bitRISC processor of NiosII, Avalon bridge, timer, SPI interface, dma controller, ethernet mac/PHY controller and interface equipment in FPGA inside.
System module hardware designs and bottom software generation can be carried out with SOPCBuilder.Self-built hardware module adopts VHDL language to realize, and finally all realize at monolithic fpga chip, be limited to present condition, audio decoder still mountain external chip VS1003 realizes, and can progressively be embedded into FPCTA inside in the fullness of time.
The principle of uninterrupted power supply: the resistance R8 in Fig. 3 and potentiometer RP4 is for detecting the lower limit of battery tension; R9 and RP5 is used for upper limit of detection value.When cell voltage is lower than lower limit, 555 set, the discharge tube cut-off of IC5 inside, now, diode D2 no current flows through.R11 is the biasing resistor of triode V1. and triode V1 is full closes conducting. and then the voltage of power supply VCC is charged to storage battery E by resistance R11 and triode V1.When storage battery E voltage rise is to the higher limit set, when namely 6 pin current potentials of chip IC 5 are higher than its threshold level, chip IC 5 resets, and the discharge tube of IC5 inside is in conducting state, and triode V1 ends.Charging stops.When accidental power failure, when 3 pin voltages of chip IC 6 drop to about 4.8V by+5V.Diode D2 conducting, storage battery E, by D2, powers to single-chip microcomputer, ensures that power supply is uninterrupted.
Claims (7)
1. the digital audio broadcast system based on internet, comprise master cpu, Ethernet R-T unit, interface circuit, power module, network audio terminal and sound collector, it is characterized in that, described sound collector collects sound and sends into network audio terminal, the output of network audio terminal connects master cpu, and master cpu also connects too net R-T unit, power module and Peripheral Interface respectively.
2. according to a kind of digital audio broadcast system based on internet according to claim 1, it is characterized in that, described network audio terminal comprises signal amplifier, decoder module, master controller, SRAM, FLASH, Ethernet chip, serial port module, display screen, indicator light and keyboard, signal amplifier receives the audio signal from sound collector and carries out amplification process to it, audio signal after amplification outputs in decoder module carries out decoding process, decoded chip is transported in master controller, main controller also connects SRAM respectively, FLASH, Ethernet chip, serial port module, display screen, indicator light and keyboard.
3. according to a kind of digital audio broadcast system based on internet according to claim 1, it is characterized in that, described power module comprises triode V1, diode D1, chip IC 5 and chip IC 6, it is characterized in that, the pin 1 contact resistance R11 of described chip IC 6, resistance R12, the anode of resistance R14 diode D1 and power supply VCC, the pin 2 of chip IC 6 connects electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, resistance R9, a stiff end of potentiometer RP4, the negative pole of storage battery E, the anode of diode D4 and the pin 1 of chip IC 5, the positive pole connecting valve S1 of storage battery E, the other end contact resistance R8 of switch S 1, a stiff end of potentiometer RP5, the anode of diode D2 and the emitter of triode V1, the other end of the base stage contact resistance R12 of triode V1 and resistance R13, the collector electrode tie point R10 of triode V1 and the other end of resistance R11, the other end of resistance R10 connects the negative electrode of diode D1, the other end of resistance R8 connects another stiff end of potentiometer RP4, the sliding end of potentiometer RP4 connects the pin 2 of chip IC 5, the other end of resistance R9 connects another stiff end of potentiometer RP5, the sliding end of potentiometer RP5 connects the pin 6 of chip IC 5, the negative electrode of diode D2 connects the other end of electric capacity C3, the other end of electric capacity C4, the pin 3 of chip IC 5 and master cpu, the other end of resistance R14 connects the pin 8 of chip IC 5, the pin 4 of chip IC 5 connects the other end of electric capacity C2 and the negative electrode of diode D4, the pin 5 of chip IC 5 connects the other end of electric capacity C1, the pin 7 of chip IC 5 connects the negative electrode of diode D3, the other end of the anode contact resistance R13 of diode D3.
4. according to a kind of digital audio broadcast system based on internet according to claim 2, it is characterized in that, described Peripheral Interface comprises USB interface, HIDM interface and RS485 interface.
5. according to a kind of digital audio broadcast system based on internet according to claim 2, it is characterized in that, described master controller is EP2C5FA484 type fpga chip able to programme.
6. according to a kind of digital audio broadcast system based on internet according to claim 2, it is characterized in that, described indicator light is LED light.
7. according to a kind of digital audio broadcast system based on internet according to claim 2, it is characterized in that, described display screen is 7 cun of LCDs.
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| CN201510929964.9A CN105515800A (en) | 2015-12-15 | 2015-12-15 | Internetwork based digital audio broadcasting system |
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| CN201510929964.9A CN105515800A (en) | 2015-12-15 | 2015-12-15 | Internetwork based digital audio broadcasting system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0868041A2 (en) * | 1997-03-27 | 1998-09-30 | Sony Corporation | Apparatus for receiving digital audio broadcast signals |
| CN2807628Y (en) * | 2005-05-13 | 2006-08-16 | 佛山天财东宝科技有限公司 | Network audio conference system |
| CN201142687Y (en) * | 2007-12-21 | 2008-10-29 | 天津先唯铁路电子设备有限公司 | Digital audio broadcast addressing terminal |
| CN101594237A (en) * | 2008-05-30 | 2009-12-02 | 广州飞达音响专业器材有限公司 | The digital public broadcasting system of IP based network |
| CN105119152A (en) * | 2015-09-25 | 2015-12-02 | 陈薇 | Protection circuit of switch cabinet |
-
2015
- 2015-12-15 CN CN201510929964.9A patent/CN105515800A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0868041A2 (en) * | 1997-03-27 | 1998-09-30 | Sony Corporation | Apparatus for receiving digital audio broadcast signals |
| CN2807628Y (en) * | 2005-05-13 | 2006-08-16 | 佛山天财东宝科技有限公司 | Network audio conference system |
| CN201142687Y (en) * | 2007-12-21 | 2008-10-29 | 天津先唯铁路电子设备有限公司 | Digital audio broadcast addressing terminal |
| CN101594237A (en) * | 2008-05-30 | 2009-12-02 | 广州飞达音响专业器材有限公司 | The digital public broadcasting system of IP based network |
| CN105119152A (en) * | 2015-09-25 | 2015-12-02 | 陈薇 | Protection circuit of switch cabinet |
Non-Patent Citations (1)
| Title |
|---|
| 傅越千: "网络数字音频公共广播***的设计", 《电声技术》 * |
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Application publication date: 20160420 |