CN102170441A - A method realizing real-time digital transmission of multipath embedded audio in KVM-OVER-IP - Google Patents
A method realizing real-time digital transmission of multipath embedded audio in KVM-OVER-IP Download PDFInfo
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- CN102170441A CN102170441A CN2011101022907A CN201110102290A CN102170441A CN 102170441 A CN102170441 A CN 102170441A CN 2011101022907 A CN2011101022907 A CN 2011101022907A CN 201110102290 A CN201110102290 A CN 201110102290A CN 102170441 A CN102170441 A CN 102170441A
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Abstract
The invention relates to a method realizing real-time digital transmission of multipath embedded audio in KVM-OVER-IP and is applicable to the field of remote transmission in need of IP multi-channel KVM-OVER-IP and integration of audio signals. The method relates to video signals, keyboard and mouse signals, audio signals, an audio and video routing device, a main processor and an audio and video switching matrix, and realizes the synchronized and real-time output of the audio signals and video signals. The method meets the requirements of some specific users through audio signal integration KVM-OVER-IP products and the increase of the audio signal transmission on the basis of the KVM, and enables the multipath and concurrent IP channels to have access to the multi-port KVM-OVER-IP, thereby realizing the function that multi-user transmit the audio signals to multiple servers through one KVM-OVER-IP apparatus.
Description
Technical field
The present invention relates to a kind of method that realizes the real-time digitization transmission in KVM-OVER-IP of multichannel embedded audio, being applicable to needs many IP tunnels KVM-OVER-IP need integrate the field that audio signal is carried out remote transmission.
Background technology
So-called KVM is exactly the abbreviation of keyboard (Keyboard), display (Video), three English prefixes of slide-mouse (Mouse).The kind of KVM is quite a lot of at present, if divide with the networking environment, then is divided into based on IP (far-end control) and non-IP (the general application) two big classes.
Cybertimes, data center's operation management constantly is faced with new challenges: machine room server increase in density, and complex management, operation cost increases and the safety management demand.IP formula KVM provides the ability of visit and control multiple servers and network data center equipment for the IT administrative staff.
Along with the expansion of IP KVM application, for the remote transmission of server another one audio signal further requirement has been arranged also, for example monitoring software alerting tone on the server is transmitted.
All simulate with the KVM product overwhelming majority of audio transmission function in the market, can not conduct interviews, limited its range of application by network.And band audio transmission function in the digital KVM product also just is confined to point-to-point prolongation use, and promptly this digital KVM can only connect a station server.Audio frequency to multiple servers carries out the remote audio transmission if desired, then needs to dispose many these digital KVM, makes cost increase greatly, and use and management simultaneously all bothers very much.
We can say on the market that in the concurrent access path multiport of many IP KVM-OVER-IP product the KVM of band embedded audio transfer function is a blank out.
China Patent No. 200910188003.1 discloses a kind of computer bidirectional analogue audio frequency transmission method based on KVM, and wherein audio signal sample is the agreement that adopts RS485, but it is an analog signal, does not convert digital signal to.
Summary of the invention
Technical problem to be solved by this invention is to overcome existing above-mentioned deficiency in the prior art, and a kind of method that realizes the real-time digitization transmission in KVM-OVER-IP of multichannel embedded audio is provided, realize the KVM-OVER-IP of multipath concurrence IP tunnel visit multiport, just realize that by a KVM-OVER-IP device many people do the function of audio signal transmission to long-range multiple servers.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of method that realizes the real-time digitization transmission in KVM-OVER-IP of multichannel embedded audio, comprise vision signal, keyboard and mouse signal, it is characterized in that: it also comprises audio signal, audio frequency and video selector switch, primary processor and audio frequency and video switching matrix, and concrete grammar is:
1) the controlled plant Voice ﹠ Video enters the audio frequency and video selector switch respectively;
2) all controlled plant audio-video signals process audio frequency and video selector switch under the effect of audio frequency and video switching matrix;
3) carry out the conversion of audio frequency PCM and video a/d;
4) realize lossless compression-encoding through the digital signal after the A/D conversion by FPGA;
5) by the transmission after FPGA is packaged into the IP bag of the transport stream behind the lossless compression-encoding;
6) under audio frequency and video switching matrix control, processing such as primary processor decodes, separates, synchronous selects the equipment needed thereby audio-video signal to export in real time at last.
Controlled plant audio frequency of the present invention is sent to the audio frequency selector switch by the RS485 interface module.
Audio frequency and video of the present invention realize synchronous transmission on main the processing.
The present invention compared with prior art, has following positive effect: integrate the KVM-OVER-IP product by audio signal, at the K(keyboard), V, (video), M(mouse) the basis on, increase the A(audio frequency) the signal transmission, satisfy some specific users' demand; Realize the KVM-OVER-IP of multipath concurrence IP tunnel visit multiport simultaneously, just realize that by a KVM-OVER-IP device many people do the function of audio signal transmission to long-range multiple servers.
Description of drawings
The schematic diagram that Fig. 1 transmits in KVM for audio signal of the present invention.
Fig. 2 is the schematic diagram of middle pitch video signal transmission of the present invention.
Fig. 3 is special-purpose modular converter (CIM) schematic internal view among the present invention.
Fig. 4 is the schematic diagram of Data Receiving of the present invention, transmission.
Embodiment
The invention will be further described below in conjunction with accompanying drawing and by embodiment.
Embodiment:
Referring to Fig. 1~Fig. 2, present embodiment comprises vision signal 1, keyboard and mouse signal 2, audio signal 3, audio frequency and video selector switch 4, primary processor 5 and audio frequency and video switching matrix 6, and concrete grammar is:
1) the controlled plant Voice ﹠ Video enters audio frequency and video selector switch 4 respectively;
2) all controlled plant audio-video signals process audio frequency and video selector switch 4 under 6 effects of audio frequency and video switching matrix;
3) carry out audio frequency PCM 7 and video a/d conversion 8;
4) realize lossless compression-encoding 9 through the digital signal after the A/D conversion 8 by FPGA;
5) by the transmission after FPGA is packaged into the IP bag of the transport stream behind the lossless compression-encoding 9;
6) under audio frequency and video switching matrix 6 control, processing such as primary processor 5 decodes, separates, synchronous selects the equipment needed thereby audio-video signal to export in real time at last.
In the present embodiment, controlled plant audio frequency 10 is sent to audio frequency selector switch 12 by RS485 interface module 11, is sent to primary processor 5 again and handles, and passes through network interface 13 at last to remote server access.Integrate the KVM-OVER-IP product by audio signal, at the K(keyboard), V, (video), M(mouse) the basis on, increase the A(audio frequency) the signal transmission, satisfy some specific users' demand.
In the present embodiment, audio frequency and video realize synchronous transmission on primary processor 5, the supervisor can be according to sound alarm information and video pictures comparison, find that in time the disabled user operates detailed process and trespasses point, in addition by access destination equipment multimedia file, realize real-time Transmission, to reach the purpose of resource-sharing.
Referring to Fig. 3, in the present embodiment, adopt the CAT5 netting twine to transmit in being connected of server and KVM, therefore in that server end must these convert RJ45 interface 34 to by dedicated convert module (CIM) VGA interface 31, USB interface 32, audio input interface 33.VGA interface 31 is encoded into 3 pairs of analog videos signal of checking the mark with R, G, B, H, V signal after by rgb video driver 35 conversion and transmits, and takies 3 pairs of cables of CAT5 netting twine; And USB interface 32 and audio input interface 33 respectively by microcontroller 36 and Audio ADC chip 37 by FPGA coding 38 after, become the RS485 standard signal, transmit by RS485 transceiver 39 again, take 1 pair of cable of CAT5 netting twine.
Referring to Fig. 4, be the schematic diagram of present embodiment Data Receiving, transmission.Wherein PCI BAR1 41 is CIM FPGA 42 registers; PCI BAR2 43 is KVM FPGA 44 output interfaces, voice data, and this BAR is all used in the output of virtual media data; Control reg 45 is used for whether opening audio frequency among the CIM FPGA 42.Operating process is as follows:
Data Receiving flow process: KVM FPGA 44 receives the frame data (passage of this frame is n) that CIM FPGA 52 sends, put into the SPACEn 46 of PCI BAR2 43, first byte of PCI BAR1 41 output states report position section m is put 0x01, second byte is put n, and in carry-out bit fragment position n, insert the follow-up positional value that writes (such as first frame 646 bytes, write 647 values), KVM FPGA 44 triggers the PCI interruption then.PPC reads status report fields and the location field among the PCI BAR1 41, read the data among the corresponding CIM FPGA 42, after data read is finished, remove the status report fields among the PCI BAR1 41, PPC need safeguard that the next one of each SPCAE 46 among the CIM FPGA 42 reads the position.
Data transmission flow: PPC writes passage n data among the SPACEn 48 of PCI BAR3 47, and in PCI BAR1 41 corresponding input state fields and location field entry value, it is described with the Data Receiving flow process to insert principle, after CIM FPGA 42 reading of data, removes the input state field.
Stop audio collection: PPC fills out 0 and stops audio collection in PCI BAR1 41 audio frequency control fields, fills out 1 beginning audio collection.When PPC write this space, KVM FPGA 44 needed the behavior by 485 interfaces control CIM FPGA 42.
Though the present invention with embodiment openly as above; but it is not in order to limit protection scope of the present invention; any technical staff who is familiar with this technology, change and the retouching done in not breaking away from design of the present invention and scope all should belong to protection scope of the present invention.
Claims (3)
1. realize the multichannel embedded audio method that real-time digitization transmits in KVM-OVER-IP for one kind, comprise vision signal, keyboard and mouse signal, it is characterized in that: it also comprises audio signal, audio frequency and video selector switch, primary processor and audio frequency and video switching matrix, and concrete grammar is:
The controlled plant Voice ﹠ Video enters the audio frequency and video selector switch respectively;
All controlled plant audio-video signals are process audio frequency and video selector switch under the effect of audio frequency and video switching matrix;
Carry out the conversion of audio frequency PCM and video a/d;
Realize lossless compression-encoding through the digital signal after the A/D conversion by FPGA;
By the transmission after FPGA is packaged into the IP bag of the transport stream behind the lossless compression-encoding;
Under audio frequency and video switching matrix control, processing such as primary processor decodes, separates, synchronous selects the equipment needed thereby audio-video signal to export in real time at last.
2. the method for realization multichannel embedded audio according to claim 1 real-time digitization transmission in KVM-OVER-IP, it is characterized in that: described controlled plant audio frequency is sent to the audio frequency selector switch by the RS485 interface module.
3. the method for realization multichannel embedded audio according to claim 1 and 2 real-time digitization transmission in KVM-OVER-IP is characterized in that: described audio frequency and video realize synchronous transmission on main the processing.
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102427523A (en) * | 2011-10-10 | 2012-04-25 | 广东威创视讯科技股份有限公司 | Multi-channel IP video coding card on the basis of FPGA (Field-Programmable Gate Array) chip |
CN104503727A (en) * | 2014-12-24 | 2015-04-08 | 杭州华三通信技术有限公司 | Audio processing method and device based on KVM system, and server |
CN109618240A (en) * | 2018-10-26 | 2019-04-12 | 安徽清新互联信息科技有限公司 | Wireless Multi-Channel adaptive equilibrium method for real-time audio and video transmission |
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CN200993768Y (en) * | 2006-11-28 | 2007-12-19 | 曙光信息产业(北京)有限公司 | IP based digitalized KVM system |
CN101583030A (en) * | 2009-06-16 | 2009-11-18 | 大连捷成实业发展有限公司 | Single CAT5 net wire based KVM extender and realization method thereof |
CN101710259A (en) * | 2009-10-20 | 2010-05-19 | 大连捷成实业发展有限公司 | Computer bidirectional simulated audio transmission method based on KVM |
CN102023720A (en) * | 2010-12-10 | 2011-04-20 | 大连捷成实业发展有限公司 | KVM (K virtual machine) multiplexing computer input analogue audio transmission system based on CAT5 |
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN200993768Y (en) * | 2006-11-28 | 2007-12-19 | 曙光信息产业(北京)有限公司 | IP based digitalized KVM system |
CN101583030A (en) * | 2009-06-16 | 2009-11-18 | 大连捷成实业发展有限公司 | Single CAT5 net wire based KVM extender and realization method thereof |
CN101710259A (en) * | 2009-10-20 | 2010-05-19 | 大连捷成实业发展有限公司 | Computer bidirectional simulated audio transmission method based on KVM |
CN102023720A (en) * | 2010-12-10 | 2011-04-20 | 大连捷成实业发展有限公司 | KVM (K virtual machine) multiplexing computer input analogue audio transmission system based on CAT5 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102427523A (en) * | 2011-10-10 | 2012-04-25 | 广东威创视讯科技股份有限公司 | Multi-channel IP video coding card on the basis of FPGA (Field-Programmable Gate Array) chip |
CN104503727A (en) * | 2014-12-24 | 2015-04-08 | 杭州华三通信技术有限公司 | Audio processing method and device based on KVM system, and server |
CN109618240A (en) * | 2018-10-26 | 2019-04-12 | 安徽清新互联信息科技有限公司 | Wireless Multi-Channel adaptive equilibrium method for real-time audio and video transmission |
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