CN2686225Y - Network audio frequency interface equipment - Google Patents
Network audio frequency interface equipment Download PDFInfo
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- CN2686225Y CN2686225Y CN 200420021342 CN200420021342U CN2686225Y CN 2686225 Y CN2686225 Y CN 2686225Y CN 200420021342 CN200420021342 CN 200420021342 CN 200420021342 U CN200420021342 U CN 200420021342U CN 2686225 Y CN2686225 Y CN 2686225Y
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Abstract
The utility model discloses a network audio frequency interface device which can be used in the audio system of the public broadcasting and the broadcasting television. The device comprises an interface unit, a signal control and processing unit, a signal conversion unit, and a power. The structural feature is that the interface unit can carry out the codec for the audio signal in order to conform the CobraNet protocol on the basis of the Ethernet transmission audio frequency signal, and the interface unit can send and receive the network interface unit of the audio data pack; the signal control and processing unit can change the transmission and the reception of the data pack number and the sub number, and the signal control and processing unit can receipt, transmit, and store the signal control and the processing unit of other various data; the signal control and processing unit is connected with the network interface unit and the signal conversion unit. The transmission, switch, and sound volume monitoring of the audio frequency signal can be realized with high efficiency on the Ethernet by adopting the audio frequency system of the interface device. The installation of the audio frequency system of the device is convenient and simple so that the design and construction of the system can be simplified and the construction cost of the system can be degraded.
Description
Technical field
The utility model relates to a kind of audio signal interface equipment, particularly a kind of network audio interface equipment.The technical foundation of this equipment is based on the Cobra Net communications protocol of Ethernet transmitting audio signal, it can be used in public broadcasting, public address and the broadcasting and TV audio system as audio signal interface equipment, makes up based on audio transmission, audio frequency switching and audio surveillance in the intelligent digitalized audio network system of one.
Background technology
The audio signal switched system in public broadcasting, public address and broadcasting and TV audio system in occupation of consequence, it is directly connected to the tonequality assurance of audio signal, the fail safe assurance of system and the ease of use and the flexibility of system, and in the cost of whole audio system, also occupied suitable component, directly have influence on the cost of system.At present, the simplest audio transmission switched system is the exchange of carrying out signal by jack panel.Along with development of electronic technology, produced analogue audio frequency matrix based on simulated audio signal, improved the flexibility and the controlled ability of system greatly, can also realize the automatic switchover of signal simultaneously.Occurred the character matrix based on digital switching technology afterwards again, the exchange and the treatment technology of advanced digital signal make the tonequality loss of audio signal in the transmission handoff procedure of character matrix reduce to minimum, and the handoff functionality of system is then strengthened greatly.Though the exchange principle of analog matrix and character matrix has had very big different, but its system configuration is similar substantially, all be to be central apparatus with the Audio Matrix, this Audio Matrix has the audio signal input, audio signal interface equipment comprises interface unit 7, signal controlling and processing unit 8, signal conversion unit 9, power supply 10, referring to Fig. 4.The audio signal of each source of sound is transported to Audio Matrix by audio cable, after the Audio Matrix exchange, is transported to each audio frequency apparatus by audio cable again.This audio system also needs to obtain by the cent devices allocation audio signal of main channel in order to realize the supervision of audio signal, will monitor audio signal by particular device again and change into analog quantity or vision signal, shows volume status by LED or TV etc. at last.
Traditional audio system structure bulky complex builds that engineering is big, time-consuming takes a lot of work, and safeguards, the maintenance difficulty, is difficult to make up the intelligent audio system.
Summary of the invention
Technical problem to be solved in the utility model is, provide a kind of and can overcome the defective that prior art exists, utilize the CobraNet communications protocol, by Ethernet transmission and exchange of audio signals, make the design of audio signal transmission, switching and surveillance and the network audio interface equipment that construction is simplified greatly.
The utility model addresses the above problem the technical scheme of being taked: this network audio interface equipment, comprise interface unit, signal controlling and processing unit, signal conversion unit, power supply, its design feature is: described interface unit for can according to based on the CobraNet communications protocol of Ethernet transmitting audio signal to encode/decode audio signal, and the network interface unit of transmission and reception packets of audio data, described signal controlling and processing unit are for changing transmission or receiving packet numbers and sub number, and can receive and send or store the signal controlling and the processing unit of other various data, it and network interface unit, signal conversion unit links to each other.Network interface unit is finished the network reception of packets of audio data and the encoding and decoding of transmission and packet are handled.
Signal controlling described in the utility model and processing unit comprise control section that is made of microprocessor and the signal processing that is made of signal processing chip, and microprocessor links to each other with network interface unit, signal processing chip, signal conversion unit; Described control section is provided with signal transformation control circuit, clock circuit, LCD liquid crystal display and LED display interface, RS232 external communication interface, GPIO interface; Described signal processing is provided with the decomposition of multi-path serial audio data stream and compound circuit, memory circuit.Signal controlling and processing unit realize and network interface unit between Control on Communication, finish the decomposition of multi-path serial audio data stream and compound, produce all various synchronizing clock signals and the control signals of signal conversion unit.The memory circuit of signal processing unit, control command of can memory control apparatus sending and operating time table according to standard time clock, are realized the automatic switchover control of this machine output signal.
Network interface unit described in the utility model is provided with audio process, has RJ45 network control interface, microprocessor control interface and RS232 asynchronous communication interface.Audio process carries out timing to each passage volume and reads, and by control interface, obtains the value in the volume register in the audio process again, realizes simultaneously that in audio transmission, switching volume monitors, improves the efficient of audio transmission, switching and supervision.
Signal conversion unit described in the utility model comprises A/D input module, D/A output module, AES/EBU digital audio and video signals input/output module.The importation of signal conversion unit converts simulated audio signal or AES/EBU digital audio and video signals to serial audio data stream that sample rate meets the requirement of CobraNet communications protocol under the control of signal controlling and processing unit; Output converts the serial audio data stream to simulated audio signal or AES/EBU digital audio and video signals under the control of signal controlling and processing unit.
The utility model compared with prior art has the following advantages and useful effect: 1, this network audio interface equipment is applied in the audio signal network matrix switched system, can monitor according to the switching of the high-quality audio signal of CobraNet communications protocol real-time Transmission, control audio signal, the volume of realization audio signal on Ethernet; Can greatly improve the efficient of audio transmission, switching and supervision, for structure integrates audio signal Network Transmission, exchange and technical foundation has been established by the intelligent network control audio system that monitors.2, use the present networks interface equipment, easy for installation simple, the design and the construction of audio signal transmission, switching and surveillance are simplified greatly, with the design of traditional audio system and construction mutually specific energy save laying of a large amount of audio cable, not only save the cable cost, but also reduced the laying work amount, greatly reduced the cost of audio system.
Description of drawings
Fig. 1 is the utility model example structure schematic block diagram.
Fig. 2 be the utility model embodiment signal flow to the workflow schematic diagram.
Fig. 3 is the utility model application example schematic diagram.
Fig. 4 is a prior art structural representation block diagram.
Embodiment
The structure of embodiment is referring to Fig. 1-Fig. 2.Signal conversion unit 6, power supply 5 that this network audio interface equipment comprises interface unit 1, signal controlling and processing unit 2, is made up of importation 3 and output 4.Interface unit 1 be can according to based on the CobraNet communications protocol of Ethernet transmitting audio signal to encode/decode audio signal, and send and receive the network interface unit 1 of packets of audio data.Signal controlling and processing unit 2 sends or receives packet numbers and son thereof number for changing, and can receive and send or store the signal controlling and the processing unit 2 of other various data, and it links to each other with network interface unit 1, signal conversion unit 6.
The network interface unit 1 of embodiment adopts the CM1 or the CM2 module of Peakaudio company.
The signal processing 201 of embodiment adopts an application-specific integrated circuit (ASIC) signal processing chip; Its major function is the compound of serial data stream and decompose, and under the control of CPU control section 202, produces the required various synchronised clocks of I/O part 3,4, produces the clock signal between CPU and CM1 or the CM2 module.
The CPU control section 202 of embodiment adopts microprocessor P89C51RD2HB modules, receives control command by the RJ45 network interface, asynchronous communication interface when RS232 etc. is provided.CPU control section 202 is by data/address bus control CM1 or CM2 module, and the work of control signal process chip provides user LCD liquid crystal and LED display interface, outside GPIO interface and outside RS232 asynchronous communication interface.CPU control section 202 has a slice clock chip P8563 to be used for timing, and a slice Serial E PROM is used for storage networking parameter and planning chart, realizes automaticallying switch.
The A/D modular converter 301 of embodiment mainly is made of high-performance A/D chip AK5392; Its major function becomes analog signal conversion the serial audio data stream of sample rate 48KHZ, precision 24BIT/20BIT, PCM form.AES/EBU input module 302 mainly is made of high performance chips CS8420; Its major function converts the AES/EBU digital audio and video signals of different sample rates to the serial audio data stream of sample rate 48KHZ, precision 24BIT/20BIT, PCM form.D/A modular converter 401 mainly is made of high-performance D/A chip CS4396; Its major function converts the serial audio data stream of sample rate 48KHZ, precision 24BIT/20BIT, PCM form to analog signal.AES/EBU output module 402 mainly is made of high performance chips CS8420; Its major function converts the serial audio data stream of sample rate 48KHZ, precision 24BIT/20BIT, PCM form to the AES/EBU digital audio and video signals.
The electrical connection of embodiment control circuit part, interface circuit part and DA conversion, AD conversion, AES/EBU conversion portion, all the known connection according to used module pin connects.
The course of work of this network audio interface equipment is as follows:
Simulated audio signal or AES/EBU audio signal convert the serial audio data stream of PCM form to by input signal conversion fraction 3, this data flow is packed according to the CobraNet communications protocol by network interface unit 1, each packets of audio data all has unique identification, each is surrounded by 1-8 passage formation, and packets of audio data is transmitted on common Ethernet by netting twine.The Bale No. that receives packets of audio data is arranged to the Bale No. that certain sends packets of audio data, just can receives the data flow of this transmission packet.This data flow is unpacked according to the CobraNet communications protocol by network interface unit 1, and by signal processing 201 decomposition, can obtain the serial audio data stream of PCM form, be transformed into analogue audio frequency or AES/EBU audio signal by output 4 circuit at last, finish audio signal from inputing to the transmission overall process of output.
After the Bale No. that sends packets of audio data in the network was determined, by changing the Bale No. that receives packets of audio data and son thereof number, son number also was 1-8, can realize any exchange of voice data in data field, finishes the switching of audio signal.
The audio process of network interface unit 1 carries out timing to each passage volume and reads, and by control interface, obtains the value in the volume register in the audio process again, just can realize that volume monitors.
The importation 3 of signal conversion unit 6 converts simulated audio signal or AES/EBU digital audio and video signals to the serial audio data stream under the control of signal controlling and processing unit 2.An equipment maximum can have 32 passage inputs.Output 4 converts the serial audio data stream to simulated audio signal or AES/EBU digital audio and video signals under the control of signal controlling and processing unit 2.An equipment maximum can receive simultaneously promptly exports 32 channel audio data.
This network audio interface equipment has following feature:
1, uses CobraNet host-host protocol and COBRANET module, on Ethernet, send and receive voice data.
2, on identical Ethernet physical medium, utilize the SNMP procotol to transmit control command, realize the audio signal switching at numeric field, and the monitoring of passage volume.
3, by the RS232 mouth, utilize asynchronous communications protocol to transmit control command, realize the audio signal switching at numeric field, and the monitoring of passage volume.
4, the asynchronous transmission control protocol intercoms mutually in the time of can utilizing between the interface equipment etc.
5, can store this machine output signal switching schedule, and table connects switching automatically according to schedule.
6, according to signal of each input voice-grade channel by the virtual quantity that is connected to the output audio passage, dynamically changing the transmission means that this machine sends Bundle is point-to-point or point-to-multipoint or broadcast type transmission, intelligent regulating networks data traffic.
The application example of network audio interface equipment in the network audio matrix is referring to Fig. 3, and I is that control appliance, II are that network audio interface equipment, III are that I/O audio signal, IV are that Ethernet, V are that serial port communication line, VI are ethernet line or optical fiber among the figure.
The network audio interface equipment allows all audio signals wait by different Bundle and enters the CobraNet audio network to all input analog or digital Audio Signal Processing and according to the CobraNet protocol packing.
Control command change reception Bundle number of each network audio interface equipment and Bundle in son Submap, realize the audio frequency output channel of audio interface device and the virtual connection between the corresponding input channel that sends voice frequency signaling set.
Control command is sent for each network audio interface equipment and reads audio volume command, thereby realizes the volume monitoring.
Control command can be controlled the computer application snmp protocol by one or more and send by the RJ45 network port, or use asynchronous communications protocol and directly control the local network audio interface device by the RS232 mouth, asynchronous communications protocol is directly controlled the far-end network audio interface device in the time of can be by RS232 mouth application etc.
Each network audio interface equipment connects by Ethernet, can disperse to be placed near each source of sound, and not need with the audio signal concentration of transmissions to certain a bit to exchange, thereby save a large amount of audio transmission cables.
The implication of the utility model said " network audio matrix " is: each network audio interface equipment connects by Ethernet, and all audio signals realize exchange, control and monitoring with digitized form in network.
Claims (4)
1, a kind of network audio interface equipment, comprise interface unit, signal controlling and processing unit, signal conversion unit, power supply, it is characterized in that: described interface unit for can according to based on the CobraNet communications protocol of Ethernet transmitting audio signal to encode/decode audio signal, and the network interface unit of transmission and reception packets of audio data, described signal controlling and processing unit are for changing transmission or receiving packet numbers and sub number, and can receive and send or store the signal controlling and the processing unit of other various data, it and network interface unit, signal conversion unit links to each other.
2, network audio interface equipment according to claim 1, it is characterized in that: described signal controlling and processing unit comprise control section that is made of microprocessor and the signal processing that is made of signal processing chip, and microprocessor links to each other with network interface unit, signal processing chip, signal conversion unit; Described control section is provided with signal transformation control circuit, clock circuit, LCD liquid crystal display and LED display interface, RS232 external communication interface, GPIO interface; Described signal processing unit is provided with the decomposition of multi-path serial audio data stream and compound circuit, memory circuit.
3, network audio interface equipment according to claim 1 and 2, it is characterized in that: described network interface unit is provided with audio process, has RJ45 network control interface, microprocessor control interface and RS232 asynchronous communication interface.
4, network audio interface equipment according to claim 1 and 2 is characterized in that: described signal conversion unit comprises A/D input module, D/A output module, AES/EBU digital audio and video signals input/output module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420021342 CN2686225Y (en) | 2004-03-29 | 2004-03-29 | Network audio frequency interface equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420021342 CN2686225Y (en) | 2004-03-29 | 2004-03-29 | Network audio frequency interface equipment |
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| CN2686225Y true CN2686225Y (en) | 2005-03-16 |
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| CN 200420021342 Expired - Lifetime CN2686225Y (en) | 2004-03-29 | 2004-03-29 | Network audio frequency interface equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101102302B (en) * | 2006-07-04 | 2010-04-14 | 北京江南天安科技有限公司 | Multi-channel audio and video signal output switcher and audio and video monitoring system and its switching method |
| CN102307245A (en) * | 2011-09-05 | 2012-01-04 | 天津光电通信技术有限公司 | Audio frequency channel data access device |
| CN102801537A (en) * | 2012-06-12 | 2012-11-28 | 东莞市龙健电子有限公司 | Digital power amplification system of Ethernet power source electricity network |
-
2004
- 2004-03-29 CN CN 200420021342 patent/CN2686225Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101102302B (en) * | 2006-07-04 | 2010-04-14 | 北京江南天安科技有限公司 | Multi-channel audio and video signal output switcher and audio and video monitoring system and its switching method |
| CN102307245A (en) * | 2011-09-05 | 2012-01-04 | 天津光电通信技术有限公司 | Audio frequency channel data access device |
| CN102307245B (en) * | 2011-09-05 | 2013-07-03 | 天津光电通信技术有限公司 | Audio frequency channel data access device |
| CN102801537A (en) * | 2012-06-12 | 2012-11-28 | 东莞市龙健电子有限公司 | Digital power amplification system of Ethernet power source electricity network |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HANGZHOU DESI TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ZHAO FAN Effective date: 20101110 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 310005 17A/F, JINJIANG BUILDING, NO.111, HUSHU SOUTH ROAD, HANGZHOU CITY, ZHEJIANG PROVINCE TO: 310005 NO.56 (5/F), GUHE LANE, GONGSHU DISTRICT, HANGZHOU CITY, ZHEJIANG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20101110 Address after: 310005, No. 56, ancient river lane, Gongshu District, Zhejiang, Hangzhou (5 floor) Patentee after: Hangzhou Desi Technology Co.,Ltd. Address before: Hangzhou City, Zhejiang province 310005 111 South Jinjiang building 17A/F Patentee before: Zhao Fan |
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| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140329 Granted publication date: 20050316 |