CN106454249A - Device for simulating multipath high-definition real-time audio and video transmission and method thereof - Google Patents
Device for simulating multipath high-definition real-time audio and video transmission and method thereof Download PDFInfo
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- CN106454249A CN106454249A CN201610938538.6A CN201610938538A CN106454249A CN 106454249 A CN106454249 A CN 106454249A CN 201610938538 A CN201610938538 A CN 201610938538A CN 106454249 A CN106454249 A CN 106454249A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/643—Communication protocols
- H04N21/6437—Real-time Transport Protocol [RTP]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/647—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
- H04N21/64746—Control signals issued by the network directed to the server or the client
- H04N21/64761—Control signals issued by the network directed to the server or the client directed to the server
- H04N21/64776—Control signals issued by the network directed to the server or the client directed to the server for requesting retransmission, e.g. of data packets lost or corrupted during transmission from server
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
- H04N21/8547—Content authoring involving timestamps for synchronizing content
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses a device for simulating multipath high-definition real-time audio and video transmission and a method thereof, and relates to the technical field of image transmission. The device comprises an audio and video processing module, an analysis module, a control module and a network transmission module which interact with one another. The method includes the steps that 1, the audio and video processing module reads packet capture files, reads data in the files and analyzes whether the files include audio and video package data or not; 2, the analysis module mainly obtains an audio and video package and timestamp and stores the audio and video package and timestamp into audio and video data package cache; 3, the control module mainly controls using which control method for sending the package; 4, the transmission module sends the data package through a network. The device is capable of processing multiple package capture files at the same time to achieve parallel processing and transmission of the multipath high-definition real-time audio and video data, achieving precise package sending, delay package sending, package loss control, jitter package sending, out-of-order package sending and repeated package sending, and simulating the environment of engineering site to solve the problem as soon as possible.
Description
Technical field
The present invention relates to image transmission technology field, more particularly, to a kind of dress of Multipexer high definition real-time audio and video transmission
Put and its method.
Background technology
With scientific and technical fast development, video monitoring has been deep into all trades and professions, arrives greatly social security, community's prison
Control, little monitor to shop, family monitoring.Increasing video resource produces, when these video resources are accessed, through net
Network is it is possible that the various problem such as time delay, packet loss；Run into this situation, be difficult under the laboratory environment of LAN
Simulate its situation it is often necessary to live investigation problem, expend substantial amounts of manpower and materials.It is thus desirable to a device can facilitate
Quickly simulate live real network environment, quick positioning simultaneously solve problem.
The Chinese invention patent of Application No. CN201410512167.5《A kind of multi-path high-definition analog audio-video based on PCIe
Frequency acquisition system》, it is mainly characterized by high definition analogue audio frequency video signal is converted into the digital audio/video literary composition of computer identification
Part, takes full advantage of PCI protocol bandwidth, can not only real-time Transmission HD video data, and there is good hardware compatibility
Property.But it is there is problems that only support the audio-video collection based on PCIe, its video source is confined to the audio frequency and video mode of PCIe,
And occur in not supporting analog network to give out a contract for a project in transmission time delay, packet loss, shake, the phenomenon such as out of order.
Therefore, the space that prior art presence has much room for improvement and develops.
Content of the invention
The purpose of the present invention is that there are the problems referred to above for prior art, provides a kind of Multipexer high definition real-time sound
The devices and methods therefor of transmission of video, simulates real-time audio and video transmission it is achieved that time delay is given out a contract for a project, lost by reading packet capturing file
Bag control, shake give out a contract for a project, out of order give out a contract for a project and repeat bidding strategy it is ensured that simulation real-time video transmission while be provided that more rich
Video flowing select, thus the state of simulated field audio video transmission, facilitate positioning and the solution of problem.
The object of the present invention is achieved like this：
With packet capturing file as foundation, automatically analyze and in file, whether contain audio, video data bag, extract audio, video data package informatin,
And accurately given out a contract for a project according to Provisioning Policy, time delay is given out a contract for a project, packet loss control, shake are given out a contract for a project, out of order give out a contract for a project or repeat to give out a contract for a project, then will
Packet is sent by network, simulation real-time audio and video transmission.
Specifically：
First, the device of Multipexer high definition real-time audio and video transmission（Abbreviation device）
This device includes audio frequency and video processing module, parsing module, control module and the network transmission module interacting successively；
Audio frequency and video processing module includes packet capturing file, file read module and the document analysis module interacting successively；
Audio, video data bag read module that parsing module includes interacting successively, the timestamp acquisition module of audio, video data bag and
Audio, video data bag cache module；
Control strategy module that control module includes interacting successively, time delay are given out a contract for a project module, packet loss control module, out of order mould of giving out a contract for a project
Block, shake are given out a contract for a project module and repeat module of giving out a contract for a project；Control strategy module also and accurately give out a contract for a project module interaction；
Packet in control module is sent by network transmission module by network.
2nd, the method for Multipexer high definition real-time audio and video transmission（Abbreviation method）
This method comprises the following steps：
1. audio frequency and video processing module reads packet capturing file, reads the data in file, whether contains sound and regard in analysis packet capturing file
Audio packet data；
2. parsing module mainly obtains audio frequency and video bag and timestamp, and is saved in audio, video data bag caching；
3. control module major control is given out a contract for a project using which kind of control method；
4. packet is sent by transport module by network.
Compared with prior art, the present invention has following advantages and good effect：
1. it is not limited to certain a video monitoring equipment, as long as the video monitoring equipment of the packet sending through network, this
Its audio video transmission situation all can be effectively simulated in invention；
2. it is not limited to HD video form, as long as through the packet of network transmission, all can really reduce its audio frequency and video and pass
Defeated situation；
3. the present invention can process multiple packet capturing files simultaneously, realize multi-path high-definition audio, video data parallel processing and transmit；
4. can pass through control strategy, realize accurately giving out a contract for a project, time delay is given out a contract for a project, packet loss control, shake are given out a contract for a project, out of order give out a contract for a project and repeat to send out
Bag；
5. can preferably model engineering scene environment, solve problem as soon as possible.
Brief description
Fig. 1 is the block diagram of this device；
Fig. 2 is the block diagram of this method；
Fig. 3 is the flow chart of audio frequency and video processing module；
Fig. 4 is the flow chart of parsing module；
Fig. 5 is the flow chart of control module；
Fig. 6 is one embodiment of the present of invention figure；
Fig. 7 is an alternative embodiment of the invention figure.
Specific embodiment
With reference to the accompanying drawings and examples to the detailed description of the invention.
First, device
1st, population structure
As Fig. 1, audio frequency and video processing module 10, parsing module 20, control module 30 and network that this device includes interacting successively pass
Defeated module 40；
2nd, functional module
1）Audio frequency and video processing module 10
Audio frequency and video processing module 10 includes packet capturing file 11, file read module 12 and the document analysis module 13 interacting successively；
* packet capturing file 11：Audio frequency and video processing module processes the packet capturing file of input；
* file read module 12：File reading is carried out to packet capturing file 11；
* document analysis module 13：The file data that file read module 12 is read is analyzed, and detects its file attribute, frame
Rate and frame time stamp information, parse whether it comprises audio/video frames, if for audio-video document.
2）Parsing module 20
Parsing module 20 includes audio, video data bag read module 21, the timestamp acquisition mould of audio, video data bag interacting successively
Block 22 and audio, video data bag cache module 23；
* audio, video data bag read module 21：Packet capturing file 11 is read out, reads audio, video data bag therein；
* the timestamp acquisition module 22 of audio, video data bag：Read the audio, video data bag of audio, video data bag read module 21
Corresponding timestamp information；
* audio, video data bag cache module 23：Preserve the timestamp of audio, video data bag read module 21 and audio, video data bag
The audio, video data bag of acquisition module 22 acquisition and timestamp information are in caching.
3）Control module 30
Control strategy module 31 that control module 30 includes interacting successively, time delay are given out a contract for a project module 33, packet loss control module 34, out of order
Module of giving out a contract for a project 35, shake are given out a contract for a project module 36 and repeat module 37 of giving out a contract for a project；Control strategy module 31 is also handed over module 32 of accurately giving out a contract for a project
Mutually；
* control strategy module 31：Judge accurately to be given out a contract for a project also to be by package control according to control strategy；
* accurately give out a contract for a project module 32：According to the result of control strategy module 31, if accurately given out a contract for a project, carry out precise control
Send packet；
* time delay is given out a contract for a project module 33：According to the result of control strategy module 31, if enter line delay and give out a contract for a project, according to prolonging of regulation
Constantly progress line delay sends packet；
* packet loss control module 34：According to the result of control strategy module 31, if carry out packet loss control, according to losing of regulation
Bag rate carries out packet loss；
* out of order package control 35：According to the result of control strategy module 31, if carry out out of order giving out a contract for a project, according to the unrest of regulation
Sequence rule sends packet；
* shake package control 36：According to the result of control strategy module 31, if carrying out shaking when giving out a contract for a project, according to trembling of regulation
Dynamic rule sends packet；
* repeat package control 37：According to the result of control strategy module 31, if carry out repeating to give out a contract for a project, according to the weight of regulation
The rule of recurrence bag sends packet.
4）Network transmission module 40
Packet in control module is sent by network transmission module 40 by network.
2nd, method
As Fig. 2, this method comprises the following steps：
1. audio frequency and video processing module reads packet capturing file, reads the data in file, whether contains sound and regard in analysis packet capturing file
Audio packet data -201；
2. parsing module mainly obtains audio frequency and video bag and timestamp, and is saved in -202 in audio, video data bag caching；
3. control module major control carries out giving out a contract for a project -203 using which kind of control method；
4. packet is sent -204 by network by transport module.
1st, step is 1.
As Fig. 3, this method step workflow 1.：
A, acquisition packet capturing file -301；
B, file read module read packet capturing file -302；
C, document analysis module parsing packet capturing file -303,
The content of parsing includes whether to comprise RTP bag, if comprise audio, video data bag；
D, judge whether file comprises RTP bag -304, be then entrance step E, otherwise jump to step A；
E, judge in RTP bag whether there is audio frequency and video bag -305, be then enter step 2., otherwise jump to step A.
2nd, step is 2.
As Fig. 4, this method step workflow 2.：
A, acquisition file middle pitch video frame rate -401；
Audio frequency and video total duration -402 in b, acquisition file；
Audio frequency and video totalframes -403 in c, acquisition file；
D, the packet loss -404 of acquisition file；
E, acquisition audio, video data bag -405；
F, the timestamp -406 of acquisition audio, video data bag；
G, determine packet sequence and timestamp information -407；
H, preservation packet are to transmission buffer area -408.
3rd, step is 3.
As Fig. 5, this method step workflow 3.：
Ith, control strategy module startup work -501；
IIth, judge whether to package control -502, be then entrance step III, otherwise enter back into step through accurately giving out a contract for a project after -508
Suddenly 4.；
IIIth, judge whether to time delay and give out a contract for a project -503, be, give out a contract for a project through time delay and enter back into step IV after -509, otherwise directly enter
Enter step IV；
IVth, judge whether to packet loss control -504, be, enter back into step V after packet loss control -510, otherwise directly enter
Enter step V；
Vth, judge whether to shake and give out a contract for a project -505, be, give out a contract for a project through shake and enter back into step VI after -511, otherwise directly enter
Enter step VI；
VIth, judge whether to out of order give out a contract for a project -506, be to enter back into step VII through out of order giving out a contract for a project after -512, otherwise directly enter
Enter step VII；
VIIth, judge whether to repeat to give out a contract for a project -507, be, enter back into step 4. through repeating to give out a contract for a project after -513, otherwise directly enter
Enter step 4..
3rd, embodiment
1st, embodiment one
Embodiments of the invention one, are to be analyzed for single packet capturing file on the basis of this method, and according to control plan
Slightly carry out a kind of mode of package control.
As Fig. 6, the workflow of the present embodiment：
, obtain packet capturing file -601；
, audio frequency and video processing module read packet capturing file -602,
Read the data in file, in analysis packet capturing file, whether contain audio frequency and video bag data；
, parsing module obtain audio frequency and video bag and timestamp information -603；
, control module judge original file information whether complete -604, be then when original document is complete, control to caching
Wrap give out a contract for a project into line delay, packet loss control, shake are given out a contract for a project, out of order give out a contract for a project, repeat bidding strategy and enter step to give out a contract for a project after -605,
Otherwise when original document is imperfect, control caching bag accurately to be given out a contract for a project after -606 and enter step；
, transport module packet is sent -607 by network.
2nd, embodiment two
Embodiments of the invention two, are to be analyzed for multiple packet capturing files on the basis of this method, and according to control plan
Slightly carry out the another way of package control.
As Fig. 7, the workflow of the present embodiment：
(1) obtain packet capturing file 1,2 ... N-701；
(2) audio frequency and video processing module reads N number of packet capturing file -702,
Read the data in file, in analysis packet capturing file, whether contain audio frequency and video bag data；
(3) parsing module reads packet capturing file middle pitch video bag and is saved in buffer area PB1, PB2 ... PBN-703；
(4) control module judges original file information whether complete -704, is then when original document is complete, controls corresponding
PB1 to PBN caching wrap give out a contract for a project into line delay, packet loss control, shake are given out a contract for a project, out of order give out a contract for a project, repeat bidding strategy to give out a contract for a project -705
Afterwards enter step (6), otherwise when original document is imperfect, control corresponding caching bag PB1 to PBN accurately given out a contract for a project-
Step is entered (6) after 706；
(5) packet is sent -707 by network by transport module, during multi-path high-definition audio, video data parallel processing, fully
Realize multidiameter delay using the roomy performance of the network throughput band of gigabit ethernet card to process.
Main control using the fine timing block that hardware timer provides of accurately giving out a contract for a project in the present invention is given out a contract for a project, permissible
Reach the accurate timing effect of 1ms, thus realizing accurate package control；Eight cores that the present invention makes full use of Cortex-A53 are processed
Device high-performance treatments ability, so as to process multiple audio-video documents.
Claims (5)
1. a kind of Multipexer high definition real-time audio and video transmitting device it is characterised in that：
Including the audio frequency and video processing module interacting successively（10）, parsing module（20）, control module（30）And network transmission module
（40）；
Audio frequency and video processing module（10）Including the packet capturing file interacting successively（11）, file read module（12）With document analysis mould
Block（13）；
Parsing module（20）Including the audio, video data bag read module interacting successively（21）, the timestamp of audio, video data bag obtains
Delivery block（22）With audio, video data bag cache module（23）；
Control module（30）Including the control strategy module interacting successively（31）, time delay gives out a contract for a project module（33）, packet loss control module
（34）, out of order module of giving out a contract for a project（35）, shake gives out a contract for a project module（36）With repeat module of giving out a contract for a project（37）；Control strategy module（31）Also and
Accurately give out a contract for a project module（32）Interaction；
Network transmission module（40）Packet in control module is sent by network.
2. the Multipexer high definition real-time audio and video transmission method based on claim 1 described device it is characterised in that include with
Lower step：
1. audio frequency and video processing module reads packet capturing file, reads the data in file, whether contains sound and regard in analysis packet capturing file
Audio packet data（201）；
2. parsing module mainly obtains audio frequency and video bag and timestamp, and is saved in audio, video data bag caching（202）；
3. control module major control is given out a contract for a project using which kind of control method（203）；
4. packet is sent by transport module by network（204）.
3. the Multipexer high definition real-time audio and video transmission method as described in claim 2 is it is characterised in that step 1. workflow
Journey：
A, acquisition packet capturing file（301）；
B, file read module read packet capturing file（302）；
C, document analysis module parsing packet capturing file（303）,
The content of parsing includes whether to comprise RTP bag, if comprise audio, video data bag；
D, judge whether file comprises RTP bag（304）, it is then to enter step E, otherwise jump to step A；
E, judge in RTP bag whether there is audio frequency and video bag（305）, it is then to enter step 2., otherwise jump to step A.
4. the Multipexer high definition real-time audio and video transmission method as described in claim 2 is it is characterised in that step 2. workflow
Journey：
A, acquisition file middle pitch video frame rate（401）；
Audio frequency and video total duration in b, acquisition file（402）；
Audio frequency and video totalframes in c, acquisition file（403）；
D, the packet loss of acquisition file（404）；
E, acquisition audio, video data bag（405）；
F, the timestamp of acquisition audio, video data bag（406）；
G, determine packet sequence and timestamp information（407）；
H, preservation packet are to transmission buffer area（408）.
5. the Multipexer high definition real-time audio and video transmission method as described in claim 2 is it is characterised in that step work 3.
Flow process：
Ith, control strategy module startup work（501）；
IIth, judge whether to package control（502）, it is then to enter step III, otherwise through accurately giving out a contract for a project（508）After enter back into
Step is 4.；
IIIth, judge whether to time delay to give out a contract for a project（503）, it is to give out a contract for a project through time delay（509）After enter back into step IV, otherwise directly
Enter step IV；
IVth, judge whether to packet loss control（504）, it is then through packet loss control（510）After enter back into step V, otherwise directly
Enter step V；
Vth, judge whether to shake to give out a contract for a project（505）, it is to give out a contract for a project through shake（511）After enter back into step VI, otherwise directly
Enter step VI；
VIth, judge whether to out of order giving out a contract for a project（506）, it is to give out a contract for a project through out of order（512）After enter back into step VII, otherwise directly
Enter step VII；
VIIth, judge whether to repeat to give out a contract for a project（507）, it is, through repeating to give out a contract for a project（513）After enter back into step 4., otherwise directly
Enter step 4..
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| CN201610938538.6A CN106454249A (en) | 2016-10-25 | 2016-10-25 | Device for simulating multipath high-definition real-time audio and video transmission and method thereof |
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| CN109451348A (en) * | 2018-10-29 | 2019-03-08 | 视联动力信息技术股份有限公司 | A kind of video flow detection method and apparatus |
| CN110996129A (en) * | 2019-12-20 | 2020-04-10 | 杭州当虹科技股份有限公司 | Method for supporting MPEG-DASH output slice number continuity |
| CN113747256A (en) * | 2020-05-29 | 2021-12-03 | 北京金山云网络技术有限公司 | Abnormal data flow simulation method and device, electronic equipment and storage medium |
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| CN113747256A (en) * | 2020-05-29 | 2021-12-03 | 北京金山云网络技术有限公司 | Abnormal data flow simulation method and device, electronic equipment and storage medium |
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