CN101938494A - Intelligent switching method for media connection modes in safe city video monitoring - Google Patents

Intelligent switching method for media connection modes in safe city video monitoring Download PDF

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Publication number
CN101938494A
CN101938494A CN 201010288461 CN201010288461A CN101938494A CN 101938494 A CN101938494 A CN 101938494A CN 201010288461 CN201010288461 CN 201010288461 CN 201010288461 A CN201010288461 A CN 201010288461A CN 101938494 A CN101938494 A CN 101938494A
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video
equipment
connected mode
rear end
end equipment
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CN101938494B (en
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许端
王世伟
贺波涛
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Wuhan Fiberhome Digtal Technology Co Ltd
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Wuhan Hongxin Telecommunication Technologies Co Ltd
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Abstract

The invention provides an intelligent switching method for media connection modes in safe city video monitoring. A monitoring system comprises front-end equipment, intermediate-end equipment and back-end equipment; and intelligent switching comprises that the back-end equipment and the front-end equipment are switched to a platform distribution connection mode from a direct connection mode and from the platform distribution connection mode to the direct connection mode. The method can fully utilize the advantages and avoid the disadvantages of the direct connection mode and the platform distribution connection mode by utilizing intelligent scheduling technology, call different connection modes in different situations, overcome weakness by acquiring strong points, and relieve the video output pressure of front-end output equipment and the video processing pressure of a platform distribution server.

Description

Medium connected mode intelligent switch method in a kind of safe city video monitoring
Technical field
The present invention is applied in the digital video monitor system of IP based network, this system is to be that standard designs with " China Telecom's video monitoring standard 3.0 editions ", utilize session initiation protocol SIP(Session Initiation Protocol) come control channel, utilize realtime transmission protocol RTP (Realtime Transport Protocol) to come the stream media information in the transmission of video, accomplish to transmit and management signaling and separating of medium.
Background technology
Digital video monitor system is a kind of brand-new supervisory control system that image and various alarm signal remote collection, transmission, storage, processing are provided for the user based on broadband network.This is a network video monitor and control system of being made up of front end, intermediate ends, rear end three parts.Front end is made up of camera lens, video camera, The Cloud Terrace, alarm switch, video decoding/encoding device, host computer control equipment and monitoring software; Intermediate ends promptly is the center service platform that telecom operators provide, and center service platform has the management function of business platform, and the image that sends is transmitted, distributed or stores, to the warning processing that links; End subscriber can be at any one access point of network in the back, no matter be monitoring scene, Surveillance center or far-end, as long as by IE browser or client software, after by authentification of user, can watch video arbitrarily, the also angle of may command video camera, the track back that furthers, control remote equipment, and can receive warning message.
Core protocol in the digital video monitoring business is: Session Initiation Protocol (Session Initiation Protocol).It is the signaling control protocol of an application layer, is used to create, revise and discharge one or more participants' session.These sessions can be Internet multimedia conferencing, IP phone or multimedia distribution.The participant of session can communicate by multicast (multicast), netted clean culture (unicast) or both mixtures.
The basic function of Session Initiation Protocol:
(1) user location (User location)---determine to participate in the terminal of communication;
(2) user capability (User capabilities)---medium and media parameter that decision signal post adopts;
(3) user availability (User availability)---whether the decision callee is ready to add communication process;
(4) call setup (Call setup)---calling party and callee is connected and the foundation of parameter;
(5) call out termination (Call Terminated)---discharge and call out relevant resource therewith.
The application of Session Initiation Protocol in digital video monitor system can be by using SIP+SDP(Session Description Protocol) set up media session: use the INVITE method to set up calling, use SDP to consult media formats, transport address or the like.Use SIP+XML(Extensible Markup Language) transmit signaling message, use the MESSAGE method, signaling uses XML to carry.The re-transmission of employing sip message guarantees the reliable delivery of message as possible.
Shown in Fig. 1 and 2 is the direct-connected video transmission mode of user and front end encoding device in the video monitoring system of the prior art.
As shown in Figure 2, when utilizing direct-connected mode, the front end encoding device directly links to each other with client, has saved intermediate link, has reduced the destabilizing factor that causes because of intermediate link, has saved bandwidth resources.But passage video of front end encoding device output number generally can not surpass 3-5, and this just makes a plurality of users can occur connecting limited when watching a front end encoding device passage, greatly reduces the utilance of video.Dotted line among Fig. 2 is represented connection failure.
Shown in Fig. 3-5 is that the platform Distributor that utilizes of user and front end encoding device is transmitted the video transmission mode of the mode of video in the video monitoring system of the prior art.
As shown in Figure 4, when the usage platform Distributor is transmitted video, under the situation that bandwidth allows, a platform Distributor can make the client about 1000 browse this video at most, solved and connected limited problem, make that video can obtain utilizing fully, when the mode that allows the cascade of platform Distributor is worked, can make more user share this front end encoding device in theory.So just make headend equipment only need export one road video flowing and give the platform Distributor, by the platform Distributor video flowing is forwarded, alleviate the operating pressure of headend equipment in transmission course, give the more powerful platform Distributor of function with the work of video transmission and go to handle.
As shown in Figure 5, on present practical project, generally be to utilize the platform Distributor to transmit video flowing, and when having only 1 tunnel client to browse this video, utilize the platform Distributor to transmit video and can make the wasting of resources of IP main line again, increase platform Distributor load, simultaneously because increasing of intermediate link increased extra destabilizing factor to video transmission.
In the prior art, when utilizing direct-connected mode, the front end encoding device directly links to each other with client, has saved intermediate link, has reduced the destabilizing factor that causes because of intermediate link, has saved bandwidth resources.But passage video of front end encoding device output number generally can not surpass 3-5, and this just makes a plurality of users can occur connecting limited when watching a front end encoding device passage, greatly reduces the utilance of video.
When the usage platform Distributor is transmitted video, under the situation that bandwidth allows, a platform Distributor can make the client about 1000 browse this video at most, solved and connected limited problem, make that video can obtain utilizing fully, when the mode that allows the cascade of platform Distributor is worked, can make more user share this front end encoding device in theory.So just make the front end encoding device only need export one road video flowing and give the platform Distributor, by the platform Distributor video flowing is forwarded, alleviate the operating pressure of front end encoding device in transmission course, give the more powerful platform Distributor of function with the work of video transmission and go to handle.On present practical project, generally be to utilize the platform Distributor to transmit video flowing, and when having only 1 tunnel client to browse this video, utilize the platform Distributor to transmit video and can make the wasting of resources of IP main line again, increase platform Distributor load, simultaneously because increasing of intermediate link increased extra destabilizing factor to video transmission.
Summary of the invention
For overcoming existing defective in the prior art, the present invention proposes the medium connected mode intelligent switch method in a kind of safe city video monitoring, this supervisory control system comprises headend equipment, intermediate ends equipment and rear end equipment, and the intelligence switching comprises that rear end equipment and headend equipment switch to platform distribution connected mode and switch to direct connected mode from the platform ways of distribution from direct connected mode.
Rear end equipment and headend equipment switch to platform distribution connected mode from direct connected mode and may further comprise the steps:
Step 11: when having only a rear end equipment and headend equipment to subscribe to the passage video of a certain headend equipment, sip proxy server will utilize direct connected mode to make to be connected with rear end equipment, directly to pass through headend equipment device transmission video flowing to the back-end;
Step 12: if when this moment, sip proxy server was received other video subscribing request at the same passage of this headend equipment, sip proxy server will select platform distribution connected mode to come transmitting video-frequency flow;
Step 13, after platform distribution connected mode was set up successfully, sip proxy server can disconnect the video channel of direct-connected mode, utilizes the MESSAGE method in the Session Initiation Protocol, send message to rear end equipment by the SIP+XML mode, the notice rear end equipment is applied for video once more;
Step 14: when sip proxy server receives that rear end equipment is subscribed to the request of this video channel, can utilize platform distribution connected mode that rear end equipment and intermediate ends equipment are coupled together;
Rear end equipment and headend equipment switch to direct connected mode from platform distribution connected mode and may further comprise the steps:
Step 21: when only remaining one tunnel video playback on the intermediate ends equipment, sip proxy server will wait for a period of time;
Step 22: if when during this period of time not having new video application to arrive at this front end video channel, sip proxy server will disconnect rear end equipment and be connected with the video of intermediate ends equipment, and utilize the MESSAGE method in the Session Initiation Protocol, send message to rear end equipment by the SIP+XML mode, the notice rear end equipment sends the video request at this passage once more;
Step 23: when sip proxy server receives that rear end equipment is subscribed to the request of this video, can utilize direct connected mode that headend equipment and rear end equipment are coupled together.
Further, intermediate ends equipment is promptly transmitted, is distributed or store the image that sends, to the warning processing that links.
Further, the agreement of using in the video monitoring system is Session Initiation Protocol.
Further, Session Initiation Protocol is used to create, revise and discharge one or more participants' session.
Further, session is Internet multimedia conferencing, IP phone or multimedia distribution.
Further, the participant of session communicates by multicast, netted clean culture or both mixtures.
The present invention utilizes the intelligent scheduling technology can make full use of the advantage of direct-connected mode and platform ways of distribution and evades their existing shortcomings, accomplishes to call under different situations different on-link mode (OLM)s, accomplishes to learn from other's strong points to offset one's weaknesses.When having only a client to subscribe to the passage video of a certain front end encoding device, sip proxy server will utilize direct-connected mode to make the front end encoding device be connected with the user, directly passes through the front end encoding device to user's transmitting video-frequency flow.And in this process, if sip proxy server is when receiving other video subscribing request at the same passage of this front end encoding device, sip proxy server will select the platform ways of distribution to come transmitting video-frequency flow, sip proxy server can disconnect the video channel of direct-connected mode simultaneously, utilize the MESSAGE method in the Session Initiation Protocol, send message to client by the SIP+XML mode, the notice client is applied for video once more, when sip proxy server is received the request of this video channel of client subscription, can utilize the platform ways of distribution that client and platform Distributor are coupled together.So just make the video way of exporting on this video channel of front end encoding device be always 1, make full use of the powerful video forwarding capability of platform Distributor and alleviate the pressure of front end output equipment in video output.
When only remaining one tunnel video playback on the platform Distributor, sip proxy server will wait for a period of time, if when during this period of time not having new video application to arrive at this front end video channel, sip proxy server will disconnect client and be connected with the video of platform Distributor, and utilize the MESSAGE method in the Session Initiation Protocol, send message to client by the SIP+XML mode, the notice client sends the video request at this passage once more.When sip proxy server is received the request of this video of client subscription, can utilize direct-connected mode that headend equipment and client are coupled together, so just accomplished of the switching of platform ways of distribution to direct-connected mode, IP main line resource on the release platform Distributor, the Video processing pressure of alleviation platform Distributor.
Description of drawings
Fig. 1: the direct connected mode schematic diagram of client and front end encoding device.
Fig. 2: maximum number of connections under client and the direct connected mode of front end encoding device.
Fig. 3: client and front end encoding device platform distribution connected mode schematic diagram.
Fig. 4: client and front end encoding device platform distribution connected mode schematic diagram under the cascade system.
Fig. 5: the platform distribution schematic diagram of client and next road video of front end encoding device platform distribution connected mode.
Fig. 6: the direct connected mode of client and front end encoding device switches to the schematic diagram of platform distribution connected mode.
Fig. 7: the platform distribution connected mode of client and front end encoding device switches to the schematic diagram of direct connected mode.
Fig. 8: client and sip proxy server, the signaling between the front end encoding device and the transmission relation of medium.
Embodiment
Utilize the intelligent scheduling technology can make full use of the advantage of direct-connected mode and platform ways of distribution and evade their existing shortcomings, accomplish under different situations, to call different on-link mode (OLM)s, accomplish to learn from other's strong points to offset one's weaknesses.
The invention will be further described below in conjunction with accompanying drawing.
Figure (6) has illustrated the step that switches to the platform ways of distribution from direct connected mode.When having only a client to subscribe to the passage video of a certain front end encoding device, sip proxy server will utilize direct-connected mode to make the front end encoding device be connected with the user, directly passes through the front end encoding device to user's transmitting video-frequency flow.And in this process, if sip proxy server is when receiving other video subscribing request at the same passage of this front end encoding device, sip proxy server will select the platform ways of distribution to come transmitting video-frequency flow, sip proxy server can disconnect the video channel of direct-connected mode then, utilize the MESSAGE method in the Session Initiation Protocol, send message to client by the SIP+XML mode, the notice client is applied for video once more, when sip proxy server is received the request of this video channel of client subscription, can utilize the platform ways of distribution that client and platform Distributor are coupled together.So just make the video way of exporting on this video channel of front end encoding device be always 1, make full use of the powerful video forwarding capability of platform Distributor and alleviate the pressure of front end output equipment in video output.
Figure (7) has illustrated the step that switches to direct connected mode from the platform ways of distribution.When only remaining one tunnel video playback on the platform Distributor, sip proxy server will wait for a period of time, if when during this period of time not having new video application to arrive at this front end video channel, sip proxy server will disconnect client and be connected with the video of platform Distributor, and utilize the MESSAGE method in the Session Initiation Protocol, send message to client by the SIP+XML mode, the notice client sends the video request at this passage once more.When sip proxy server is received the request of this video of client subscription, can utilize direct-connected mode that headend equipment and client are coupled together, so just accomplished of the switching of platform ways of distribution to direct-connected mode, IP main line resource on the release platform Distributor, the Video processing pressure of alleviation platform Distributor.
Figure (8) has illustrated the relation that Signaling Layer separates with Media layer, sip proxy server is positioned at Signaling Layer, come client and media distribution service device are managed work by the SIP signaling, and in Media layer, client and media distribution service device are the transmission work of carrying out Media Stream by the RTP/RTCP agreement.
In practical project, use the intelligent scheduling technology and can carry out the automatic switchover of direct-connected mode and platform ways of distribution according to number of users, the situation of video flowing disconnection for some time during switching, but the delay time of this process has only several seconds, do not influence watching and recording process of whole video, so can be applied in the practical video supervisory control system.
The above only is a preferred embodiments of the present invention, and the interest field that the present invention advocated is not limited thereto.The present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those skilled in the art work as can make various corresponding changes and distortion according to the present invention, but these changes and distortion all should belong to the protection range of the appended claim of the present invention.

Claims (6)

1. the medium connected mode intelligent switch method in the safe city video monitoring, this supervisory control system comprises headend equipment, intermediate ends equipment and rear end equipment, and the intelligence switching comprises that rear end equipment and headend equipment switch to platform distribution connected mode and switch to direct connected mode from the platform ways of distribution from direct connected mode;
Rear end equipment and headend equipment switch to platform distribution connected mode from direct connected mode and may further comprise the steps:
Step 11: when having only a rear end equipment and headend equipment to subscribe to the passage video of a certain headend equipment, sip proxy server will utilize direct connected mode to make to be connected with rear end equipment, directly to pass through headend equipment device transmission video flowing to the back-end;
Step 12: if when this moment, sip proxy server was received other video subscribing request at the same passage of this headend equipment, sip proxy server will select platform distribution connected mode to come transmitting video-frequency flow;
Step 13, after platform distribution connected mode was set up successfully, sip proxy server can disconnect the video channel of direct-connected mode, utilizes the MESSAGE method in the Session Initiation Protocol, send message to rear end equipment by the SIP+XML mode, the notice rear end equipment is applied for video once more;
Step 14: when sip proxy server receives that rear end equipment is subscribed to the request of this video channel, can utilize platform distribution connected mode that rear end equipment and intermediate ends equipment are coupled together;
Rear end equipment and headend equipment switch to direct connected mode from platform distribution connected mode and may further comprise the steps:
Step 21: when only remaining one tunnel video playback on the intermediate ends equipment, sip proxy server will wait for a period of time;
Step 22: if when during this period of time not having new video application to arrive at this front end video channel, sip proxy server will disconnect rear end equipment and be connected with the video of intermediate ends equipment, and utilize the MESSAGE method in the Session Initiation Protocol, send message to rear end equipment by the SIP+XML mode, the notice rear end equipment sends the video request at this passage once more;
Step 23: when sip proxy server receives that rear end equipment is subscribed to the request of this video, can utilize direct connected mode that headend equipment and rear end equipment are coupled together.
2. method according to claim 1, wherein intermediate ends equipment is promptly transmitted, is distributed or store the image that sends, to the warning processing that links.
3. method according to claim 1 and 2, wherein the agreement of using in the video monitoring system is Session Initiation Protocol.
4. method according to claim 3, wherein Session Initiation Protocol is used to create, revise and discharge one or more participants' session.
5. method according to claim 4, wherein session is Internet multimedia conferencing, IP phone or multimedia distribution.
6. method according to claim 5, wherein the participant of session communicates by multicast, netted clean culture or both mixtures.
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CN103999456A (en) * 2012-11-30 2014-08-20 华为技术有限公司 Media stream transmission method and relevant device and system
CN104184959A (en) * 2014-07-18 2014-12-03 深圳市邦彦信息技术有限公司 Device and method for realizing matrix video checking
CN105450994A (en) * 2015-12-03 2016-03-30 河北远东通信系统工程有限公司 Video commanding and dispatching system and method based on RTSP
CN106791695A (en) * 2017-01-13 2017-05-31 邦彦技术股份有限公司 The distribution method and its device of a kind of monitor video
WO2017113455A1 (en) * 2015-12-30 2017-07-06 邦彦技术股份有限公司 Multilevel media distribution method and system based on sip
CN109361671A (en) * 2018-10-23 2019-02-19 华南理工大学 A kind of streaming media framework method based on Session Initiation Protocol
CN109947992A (en) * 2019-03-05 2019-06-28 北京旷视科技有限公司 Retrieve management-control method, head end video processing method, control control method and device
CN111163363A (en) * 2019-12-26 2020-05-15 武汉兴图新科电子股份有限公司 Method for dynamically adjusting video transmission route

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CN101742267A (en) * 2009-12-31 2010-06-16 武汉市公安科学技术研究所 Video monitoring system of full digitalized networking safe city

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CN101742267A (en) * 2009-12-31 2010-06-16 武汉市公安科学技术研究所 Video monitoring system of full digitalized networking safe city

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103999456A (en) * 2012-11-30 2014-08-20 华为技术有限公司 Media stream transmission method and relevant device and system
CN104184959A (en) * 2014-07-18 2014-12-03 深圳市邦彦信息技术有限公司 Device and method for realizing matrix video checking
CN105450994A (en) * 2015-12-03 2016-03-30 河北远东通信系统工程有限公司 Video commanding and dispatching system and method based on RTSP
CN105450994B (en) * 2015-12-03 2018-09-11 河北远东通信系统工程有限公司 A kind of video directing and scheduling system and method based on RTSP agreements
WO2017113455A1 (en) * 2015-12-30 2017-07-06 邦彦技术股份有限公司 Multilevel media distribution method and system based on sip
CN106791695A (en) * 2017-01-13 2017-05-31 邦彦技术股份有限公司 The distribution method and its device of a kind of monitor video
CN109361671A (en) * 2018-10-23 2019-02-19 华南理工大学 A kind of streaming media framework method based on Session Initiation Protocol
CN109947992A (en) * 2019-03-05 2019-06-28 北京旷视科技有限公司 Retrieve management-control method, head end video processing method, control control method and device
CN111163363A (en) * 2019-12-26 2020-05-15 武汉兴图新科电子股份有限公司 Method for dynamically adjusting video transmission route

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