CN201893854U - Video and audio delay system based on video channel card and universal server platform - Google Patents
Video and audio delay system based on video channel card and universal server platform Download PDFInfo
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- CN201893854U CN201893854U CN 201020630920 CN201020630920U CN201893854U CN 201893854 U CN201893854 U CN 201893854U CN 201020630920 CN201020630920 CN 201020630920 CN 201020630920 U CN201020630920 U CN 201020630920U CN 201893854 U CN201893854 U CN 201893854U
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Abstract
The utility model relates to a look audio frequency delay system based on video channel card and general server platform, it not only can realize conventional look audio signal time delay, can realize that the whole high quality code stream of delay time arbitrary settlement, live broadcast signal simultaneously records, the real-time stack of station mark clock sign and picture and text sign plays functions such as. The system comprises: the system comprises a rack server, a data storage carrier, an all-digital input and output channel card for signal input and acquisition and a digital video card for signal output and playback; from the actual operation condition, the safety of live broadcast active content is ensured, and the recording of the live broadcast content is backed up on equipment, so that the tape uploading process of the live broadcast content is omitted, and the program making process is accelerated.
Description
Technical field
The utility model relates to the audio frequency and video transmission of radio and television and the technical field of storage, specifically is a kind of audio delay system of looking based on video channel card and generic service applicator platform.
Background technology
Early stage because the analog video data amount is very big, after transforming by digital-to-analogue, data volume is also very big, so will utilize the respective coding technology, video data is carried out the coding of high compression ratio under the technical indicator that satisfies the Network Transmission requirement, to satisfy transmission requirement.Along with the continuous development of audio/video coding technology and the development of broadband network technology, it is easier to be lower with cost that the realization of video transmission becomes, and makes that the demand of video transmission is growing.
Under this background, the network video server technology is arisen at the historic moment, it has effectively overcome traditional shortcoming and defect of looking the audio delay device based on the storage chip formula, and this technology is on the one hand with simple integrated networks of function such as multichannel, Network Transmission, video recording and broadcasts.Network video server passes through network technology on the other hand, can realize as long as picture just can be browsed in the place that can surf the Net, and the multi-protocols support of network video server, carry out perfect the combination with computer equipment, thereby form bigger system integration network.(static, normal activity, high-speed motion), image resolution ratio, transmitted image frame number because different image state; it is widely different that it takies the network bandwidth; therefore objectively transmission delay is inevitable; to this; a kind of more unified image state can be set usually, and promptly for the normal activity image, image resolution ratio reaches 352*288; frame number is under the situation of 25 frame/seconds, the network bandwidth that one road video image is shared.
The related delayed time system software of the utility model is developed based on the DirectShow of Microsoft framework, present most video card is all supported the DirectShow framework, therefore make the extensibility of calling program and the compatibility of video card is all improved a lot, what adopt in this delayed time system is the design of SD 50Mb code stream, show by experiment, all adopting under the situation of HD video card, server adopts two cpu types, under the compress mode that adopts high definition 100Mb, the time-delay server still can easily be tackled.By designing and developing of delayed time system, not only guaranteed the fail safe of on-the-spot broadcasting activity description, by the omnidistance high code stream record of delayed time system, not only recording of live content done the backup on the equipment simultaneously, also accelerated the making flow process of program simultaneously live content.
Summary of the invention
The technical problem that will solve of the present utility model provides a kind of audio delay system of looking based on video channel card and generic service applicator platform, it not only can realize conventional video/audio signal time-delay, can realize delay time setting, broadcast live arbitrarily simultaneously the omnidistance high-quality high code stream of signal is recorded, the functions such as real-time stack broadcast of station symbol clock sign and picture and text sign.
For solving the problems of the technologies described above, the utility model provides a kind of audio delay system of looking based on video channel card and generic service applicator platform, and it comprises: rack-mount server, data storage carrier, be used for signal input and the digital I/O channel card of gathering and be used for the digital video adapter of signal output and playback; Described data storage carrier is located in the hard disk support bracket in the described rack-mount server; Described digital I/O channel card is plugged in the PCI-X expansion slot in the rack-mount server; Described digital video adapter is plugged in the PCIe expansion slot in the rack-mount server.The PCI-X interface is and the renewal version of the pci bus that connects, still adopts traditional bussing technique, but the wiring stitch of greater number is arranged.The PCIe interface is the bus interface of a new generation of adopting in the server.
Further, described data storage carrier is for continuing the SATA hard disk that transmission rate can reach 60MB/S, and the SATA hard disk is a kind of hard disk of the serial hardware driver interface based on industry standard.
Further, described digital I/O channel card adopts the Decklink pci interface.
Further, described digital video adapter adopts the band Decklink SDI digital video adapter of input, PCIe interface synchronously.
Further, the input/output interface of described digital video adapter adopts bnc interface.
Further, for compression of video data, system adopts the form of MPEG-2 P422@ML 50Mb/S to compress, voice data then adopts MPEG-1 Layer-2 form to compress, multiplexing by to video/audio finally is stored on the described data storage carrier SATA hard disk with document form with MPEG-2 PS stream format.
The beneficial effect that the utlity model has is: the audio delay system of looking of the present utility model has overcome traditional shortcoming and defect of looking the audio delay device based on the storage chip formula, has provided a kind of novel audio delay system of looking based on video channel card and generic service applicator platform.This system has not only realized the time-delay of conventional video/audio signal, has realized the not available delay time of traditional delayed time system setting, broadcast live arbitrarily simultaneously the omnidistance high-quality high code stream of signal is recorded, the functions such as real-time stack broadcast of station symbol clock sign and picture and text sign.From practical operation situation, by designing and developing of delayed time system, not only guaranteed the fail safe of on-the-spot broadcasting activity description, simultaneously by the omnidistance high-quality high code stream record of delayed time system to live content, not only recording of live content done the backup on the equipment, also save the tape upload process of live content, accelerated the making flow process of program.
Description of drawings
For the easier quilt of content of the present utility model is clearly understood, below the specific embodiment and in conjunction with the accompanying drawings of basis, the utility model is described in further detail, wherein
Fig. 1 is the structured flowchart of the hardware components of looking audio delay system among the embodiment.
Fig. 2 is described process flow block diagram of looking audio delay system to digital I/O channel card (Decklink video card) dateout.
Fig. 3 is described FB(flow block) of looking audio delay system playback section reading video data.
Embodiment
See Fig. 1-3, the audio delay system of looking based on video channel card and generic service applicator platform of present embodiment comprises: rack-mount server, data storage carrier, be used for signal input and the digital I/O channel card of gathering and be used for the digital video adapter of signal output and playback; Described data storage carrier is located in the hard disk support bracket in the described rack-mount server; Described digital I/O channel card is plugged in the PCI-X expansion slot in the rack-mount server; Described digital video adapter is plugged in the PCIe expansion slot in the rack-mount server.
Whole hardware configuration of looking audio delay system is: the server that delayed time system adopts is DELL 860 1U rack-mount servers, this server degree of depth is 560mm, possess a PCI-X expansion slot and a PCIe expansion slot, inside possesses two 3.5 cun hard disk support brackets, adopts the SATA hard disk as data storage carrier.In the configuration of the signal input and output channel card of delayed time system, adopt the digital I/O channel card of Decklink pci interface as the signal input with gather and use; Adopt the Decklink SDI digital video adapter of the synchronous input of band, PCIe interface to use as signal output and playback.Two kinds of distinct interfaces video card mate fully with inner two PCI-X that reserve of server and PCI-E expansion slot, its basic structure block diagram is as shown in Figure 1.
Whole software section basic structure of looking audio delay system is: live broadcast vehicle switches the SDI digital signal of output, after looking the Audio Distribution System processing in the live broadcast vehicle, deliver to Decklink video card digital input port, the delayed time system software section to the uncompressed data stream of Decklink video card output compress, coding, stores processor and data processing, it handles block diagram as shown in Figure 2.
For compression of video data, system adopts the form of MPEG-2 P422@ML 50Mb/S to compress, voice data then adopts MPEG-1 Layer-2 form to compress, and multiplexing by to video/audio finally is stored on the server hard disc with document form with MPEG-2 PS stream format.In the delayed time system playback section, delayed time system reads the video file data that writing down from hard disk, by the MPEG-2 video file looked audio frequency separation, decoding, the stack of icon character information, final digital signal by Decklink SDI video card output time-delay, use for program transmission and surveillance, in order to realize the synchronous of systems such as delayed time system output signal and broadcast, utilize the GENLOCK synchronous input end mouth and the system synchronization of Decklink SDI video card, flow chart of data processing as shown in Figure 3.System has realized the real-time stack of flag informations such as clock information and station symbol by programming, and unit has realized that broadcast system finishes the function that above-mentioned functions necessary clock station symbol generator and key mix equipment such as device.
During delayed time system work, the collecting part of software at first starts the collection and the record the process of video data, after the delay time of setting arrives, the playback section of software starts the playback process of program, carry out the time-delay of programme televised live, and the time difference of two process initiations is exactly the delay time that program broadcasts.In order to realize delay operation more flexibly, further optimization has been done by system: 1, system design the insertion of pad and advertising programme broadcast and cover and broadcast function.Pad tabulation that layout in advance need be broadcasted and advertising programme tabulation, before program broadcasts and can carry out the tabulation broadcast of pad and advertising programme in the broadcast process, when program is set for the insertion broadcast, the program of current delay suspends broadcast, when the program broadcast of inserting finishes or manually broadcast is returned in setting, the program that current delay is broadcasted will continue to broadcast, in this case, both realized the complete broadcast of programme televised live, realized again that the insertion of pad and advertising programme was broadcasted.2, system is provided with rejecting by hot key does not need to broadcast picture, after the picture that does not need to broadcast occurs, reject a little by being provided with, because the reflection time of personnel operation, system was gone into rejecting a little 2 seconds in advance automatically, when program broadcasts the rejecting point, if the rejecting point has been set, then jump to automatically and reject picture and go out to locate to broadcast, do not eliminate a little, then broadcast default pad automatically and broadcast eliminating a little of picture up to being provided with time-delay if also be provided with.3, by the design of delayed time system software inhouse, realized the straight-through function of BYPASS of input signal, in the recorded broadcast activity that does not need to delay time, this delayed time system can be used as binary channels DVR use, 4, delayed time system is provided with mute function, when in live activity, needing to remove acoustic scene, can directly use this function.In order to adapt to the inner compact space layout of live broadcast vehicle, for the operation part of delayed time system, selected IBM rack KVM unit, in the 1U space integrated keyboard, mouse and display, thus made things convenient for the use of delayed time system in the limited space of live broadcast vehicle.Delayed time system software is developed based on the DirectShow of Microsoft framework, present most video card is all supported the DirectShow framework, therefore make the extensibility of calling program and the compatibility of video card is all improved a lot, what adopt in this delayed time system is the design of SD 50Mb code stream, show that by experiment all adopting under the situation of HD video card, server adopts two cpu types, under the compress mode that adopts high definition 100Mb, the time-delay server still can easily be tackled.
The foregoing description only is for the utility model example clearly is described, and is not to be qualification to execution mode of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all execution modes.
Claims (2)
1. audio delay system of looking based on video channel card and generic service applicator platform is characterized in that comprising: rack-mount server, data storage carrier, be used for signal input and the digital I/O channel card of gathering and be used for the digital video adapter of signal output and playback;
Described data storage carrier is located in the hard disk support bracket in the described rack-mount server;
Described digital I/O channel card is plugged in the PCI-X expansion slot in the rack-mount server;
Described digital video adapter is plugged in the PCIe expansion slot in the rack-mount server.
2. a kind of audio delay system of looking based on video channel card and generic service applicator platform according to claim 1, it is characterized in that: described data storage carrier is the SATA hard disk.
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| CN 201020630920 CN201893854U (en) | 2010-11-29 | 2010-11-29 | Video and audio delay system based on video channel card and universal server platform |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103974089A (en) * | 2013-02-06 | 2014-08-06 | 北京昆腾微电子有限公司 | Wireless audio and video transmitter and wireless audio and video processing method |
| CN109660838A (en) * | 2018-12-19 | 2019-04-19 | 上海众源网络有限公司 | A kind of net cast stream generating method, device and electronic equipment |
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2010
- 2010-11-29 CN CN 201020630920 patent/CN201893854U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103974089A (en) * | 2013-02-06 | 2014-08-06 | 北京昆腾微电子有限公司 | Wireless audio and video transmitter and wireless audio and video processing method |
| CN103974089B (en) * | 2013-02-06 | 2017-07-28 | 北京昆腾微电子有限公司 | Wireless audio and video emitter and wireless audio and video processing method |
| CN109660838A (en) * | 2018-12-19 | 2019-04-19 | 上海众源网络有限公司 | A kind of net cast stream generating method, device and electronic equipment |
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