CN101448072A - Video viewing method and system of Internet video monitoring system - Google Patents
Video viewing method and system of Internet video monitoring system Download PDFInfo
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- 230000004044 response Effects 0.000 claims description 8
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Abstract
The invention discloses a video viewing method of an Internet video monitoring system. The method comprises the following steps: the video monitoring and controlling platform of an Internet video monitoring system transmits commands to each front-end equipment transmit stream in advance, and notifies the front-end equipment to send video stream to a stream media server; a video viewing client-side sends viewing request corresponding to appointed front-end equipment to the video monitoring and controlling platform when the video of the appointed front-end equipment is required to be viewed; the video monitoring and controlling platform notifies the stream media server to give out the received video stream of the appointed front-end equipment to the video viewing client-side according to the viewing request. In addition, the invention also discloses an Internet video monitoring system. The technical proposal can shorten the time delay for viewing the video.
Description
Technical field
The present invention relates to the Network Video Surveillance technology, relate in particular to a kind of video inspection method and corresponding network video monitor and control system of network video monitor and control system.
Background technology
In video monitoring system, compare with traditional analog video monitoring system transmission is convenient because the IP network video monitoring system has, storage easily, advantage that management is flexible etc., so use more and more.Fig. 1 is the structural representation of present network video monitor and control system, and as shown in Figure 1, this system mainly comprises: headend equipment, monitoring management platform, streaming media server and client.Wherein, the video acquisition headend equipment mainly comprises: video monitoring video camera, IP camera (Camera), digital video frequency server (Digital Video Server, DVS), digital video recorder (Digital VideoRecorder, DVR) be connected simulation camera etc. with video encoder, headend equipment is the information gathering end of video monitoring system, is responsible for the digital collection coding of monitor messages such as audio frequency, video and warning.The monitoring management platform is generally one or more servers, is responsible for the operation and management of system, comprises monitoring business functions such as equipment access and signaling transmission.Streaming media server is generally the server of hardware or software, is responsible for the transmission and the functions such as forwarding and storage of Media Stream.Client is the software interface device that the user uses, and is generally PC or video wall or terminal when mobile, be responsible for the user and represent business such as the real-time video of video monitoring system and on-demand playback, and the administering and maintaining of responsible equipment.
But network video monitor and control system has bigger time-delay usually with respect to traditional analog video monitoring system.For example, for the analog video supervisory control system, if the user wants to check the video image of certain video camera, common order is: the first step, and the user is by terminal control of video matrix, selects to want the video source of checking, and this step is not time-delay almost.In second step, video matrix is by the switching of switching signal, and user's instruction is responded, and this step has the time-delay of a few tens of milliseconds, depends on matrix.In the 3rd step, video wall or other subscriber terminal equipment demonstrate the video source content of pointing out, this step is not time-delay almost.As seen, above step finish response usually in a few tens of milliseconds, so the time-delay of video is very little owing to all be the switching of the electric signal of simulation, almost is equal to not time-delay.
And for network video monitor and control system, handle the step that real-time video checks at present and be generally: the first step, the user sends to video monitoring management platform by client software and checks instruction, and this step time-delay is very little, almost can ignore.In second step, video monitoring management platform sends the request of checking to the headend equipment of video source as web camera or video coding server, and this step time-delay is very little, almost can ignore.In the 3rd step, the headend equipment response request of responsible information gathering according to the state of coding, is selected suitable I frame time point, sends video flowing to streaming media server, and this step is chronic usually, needs approximately more than 100 milliseconds.In the 4th step, streaming media server is transmitted video flowing, and this step needs the time-delay of a few tens of milliseconds usually.In the 5th step, client is received the video flowing that streaming media server is transmitted, and decoding checks that this step needs the time-delay of a few tens of milliseconds usually.
As seen, present network video monitor and control system is because each wants to check video image the user, all to carry out above-mentioned five steps operation, and the operation of the 3rd step is delayed time more than 100 milliseconds again, therefore make network video monitor and control system have bigger time-delay, and the processing of real-time video time-delay more and more become and influence the key factor that people select network monitoring system than traditional analog video monitoring system.
Summary of the invention
In view of this, provide a kind of video inspection method of network video monitor and control system among the present invention on the one hand, a kind of network video monitor and control system is provided on the other hand, so that shorten the time delay that video is checked.
The video inspection method of network video monitor and control system provided by the present invention comprises:
Video monitoring management platform in the network video monitor and control system sends circulation to each headend equipment in advance and sends instructions, and notifies described headend equipment to begin to send video flowing to streaming media server;
When video viewing client-side is checked the video of specifying headend equipment at needs, send the request of checking of corresponding described appointment headend equipment to video monitoring management platform;
Video monitoring management platform is checked request according to described, and the video flowing of the described appointment headend equipment that the notification streams media server will receive is distributed to described video viewing client-side.
Preferably, described video monitoring management platform in advance forward end equipment send circulation send instructions for: when network video monitor and control system started, described video monitoring management platform forward end equipment sent to circulate and sends instructions;
Perhaps be: video monitoring management platform carries out the probability statistics that video is checked according to client, sends circulation at the time point of setting to each headend equipment and sends instructions.
Network video monitor and control system provided by the present invention comprises: headend equipment, video monitoring management platform, streaming media server and client, wherein,
Described video monitoring management platform is used for the circulation of forward end equipment transmission in advance and sends instructions, and notifies described headend equipment to send video flowing to streaming media server; After receive correspondence that client sends specify headend equipment check request after, send to divide to described streaming media server and send instructions, the video flowing of notifying the described appointment headend equipment that described streaming media server will receive is to being distributed to described client;
Described headend equipment is used for sending instructions according to the described circulation from video monitoring management platform, and the video flowing behind the capturing and coding is sent to streaming media server;
Client is used for when needs are checked the video of specifying headend equipment, sends the request of checking of corresponding described appointment headend equipment and the video flowing of receiving stream media server distribution to video monitoring management platform;
Streaming media server is used to receive the video flowing from headend equipment, and sends instructions according to the branch from video monitoring management platform, with the video flowing of the appointment headend equipment that receives to being distributed to clients corresponding.
Preferably, described video monitoring management platform comprises:
Pretreatment unit, be used for when network video monitor and control system starts, perhaps carrying out the setting-up time point that probability statistics that video checks obtain according to client, forward end equipment sends circulation and sends instructions, and notifies described headend equipment to send video flowing to streaming media server;
The real-time video response unit, be used to receive the request of checking of specifying headend equipment from the correspondence of client, check request according to described, send to divide to described streaming media server and send instructions, the video flowing of notifying the described appointment headend equipment that described streaming media server will receive is to being distributed to described client.
From such scheme as can be seen, begin to send video flowing by each headend equipment of prior notice among the present invention to streaming media server, streaming media server is checked in client-requested before the video of certain headend equipment, just received video flowing always from each headend equipment.When client-requested is checked the video flowing of certain headend equipment, only needing the notification streams media services that the video flowing of this headend equipment is distributed to this client gets final product, thereby got around when the video of headend equipment is checked in each at present request and all need notify headend equipment, and headend equipment prepares to send to streaming media server the long delay process of video flowing, thereby reduced the time delay that video is checked in the network video monitor and control system, improve user experience, strengthened the market competitiveness of network video monitor and control system.
Description of drawings
Fig. 1 is the structural representation of network video monitor and control system;
Fig. 2 is the structural representation of video monitoring management platform in the embodiment of the invention;
Fig. 3 is the schematic flow sheet of the video inspection method of network video monitor and control system in the embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in more detail.
In the embodiment of the invention, for the video that reduces network video monitor and control system is checked time delay, the video that strengthens network video monitor and control system is checked real-time, consideration is checked before the video of certain headend equipment in client-requested, just make streaming media server reception earlier from the video flowing of each headend equipment, like this when client-requested is checked the video flowing of certain headend equipment, directly the notification streams media services are distributed to this client with the video flowing of this headend equipment and get final product, thereby get around when the video of headend equipment is checked at present each request and all need notify headend equipment, and headend equipment prepares to send to streaming media server the long delay process of video flowing.
For this reason, network video monitor and control system in the embodiment of the invention changes original Signalling exchange mode, specifically comprise: video monitoring management platform is used for sending circulation to each headend equipment in advance and sends instructions, and notifies described headend equipment to send video flowing to streaming media server; After receive correspondence that client sends specify headend equipment check request after, send to divide to streaming media server and send instructions, the video flowing of notifying the appointment headend equipment that described streaming media server will receive is to being distributed to described client.As seen, video monitoring management platform no longer is to notify corresponding headend equipment to send video flowing to streaming media server according to the request of checking of client, but each headend equipment of prior notice sends video flowing to streaming media server; Correspondingly, video monitoring management platform does not reinform headend equipment and sends video flowing to streaming media server after the request of checking that receives client, but directly the notification streams media server is checked the video flowing of the client distribution correspondence of request to transmission.
And it is consistent in the function of headend equipment, client and streaming media server and the prior art.Be that headend equipment is used for sending instructions according to the described circulation from video monitoring management platform, the video flowing behind the capturing and coding is sent to streaming media server.Client is used for when needs are checked the video of specifying headend equipment, sends the request of checking of corresponding described appointment headend equipment and the video flowing of receiving stream media server distribution to video monitoring management platform.Streaming media server is used to receive the video flowing from headend equipment, and sends instructions according to the branch from video monitoring management platform, with the video flowing of the appointment headend equipment that receives to being distributed to clients corresponding.
Wherein, send before the request of checking in order to be implemented in client, video monitoring management platform can send circulation to each headend equipment in advance and send instructions, and can just send circulation by video monitoring management platform to each headend equipment when network video monitor and control system just starts in the present embodiment and send instructions.Perhaps, also can carry out the probability statistics that video is checked, preestablish to each headend equipment and send the time point that circulation sends instructions, send circulation at this setting-up time point to each headend equipment by video monitoring management platform afterwards and send instructions according to client.Perhaps, also can adopt other mode, enumerate no longer one by one herein.
During specific implementation, the inside of video monitoring management platform is realized and can be comprised as shown in Figure 2: pretreatment unit and real-time video response unit.
Wherein, pretreatment unit is used for the circulation of forward end equipment transmission in advance and sends instructions, for example, when network video monitor and control system starts, perhaps carrying out the setting-up time point that probability statistics that video checks obtain according to client, forward end equipment sends circulation and sends instructions, and notifies described headend equipment to send video flowing to streaming media server.
The real-time video response unit is used to receive the request of checking of specifying headend equipment from the correspondence of client, check request according to described, send to divide to described streaming media server and send instructions, the video flowing of notifying the described appointment headend equipment that described streaming media server will receive is to being distributed to described client.
Based on above-mentioned network video monitor and control system, the video inspection method of the network video monitor and control system in the embodiment of the invention can be as shown in Figure 3, and Fig. 3 is the schematic flow sheet of the video inspection method of network video monitor and control system in the embodiment of the invention.This flow process comprises the steps:
In this step, during specific implementation, video monitoring management platform can send instructions when network video monitor and control system starts in forward end equipment transmission circulation, headend equipment sends instructions according to this circulation, video flowing behind the capturing and coding is sent to streaming media server, after then network video monitor and control system started, streaming media server just received the video flowing from each headend equipment always.
Perhaps, video monitoring management platform can carry out the probability statistics that video is checked according to client, sending circulation at the time point of setting to each headend equipment sends instructions, headend equipment sends instructions according to this circulation, video flowing behind the capturing and coding is sent to streaming media server, afterwards, streaming media server just receives the video flowing from each headend equipment always.
When step 302, video viewing client-side are checked the video of specifying headend equipment at needs, send the request of checking of corresponding described appointment headend equipment to video monitoring management platform.
In this step, because streaming media server is receiving the video flowing from headend equipment always, therefore after video monitoring management platform receives the request of checking, directly divide to send instructions and get final product to the streaming media server transmission, the video flowing of the described appointment headend equipment that the notification streams media server will receive is to being distributed to described video viewing client-side, then streaming media server is distributed the video flowing of correspondence receiving after branch sends instructions.
As seen, transform by handling process in the embodiment of the invention network video monitor and control system, each headend equipment to network video monitor and control system, as web camera or video coding server, no matter whether the request of checking of client is arranged, just send video flowing, when client need be checked real-time video, saved the time-consuming process of monitor supervision platform forward end device request video flowing the most consuming time, headend equipment preparation video flowing like this from the trend streaming media server.As seen, only carry out once in advance by monitor supervision platform forward end device request video flowing that will be the most consuming time, the time-consuming process that headend equipment is prepared video flowing, for example, when system start-up, carry out once, by being that step 1 and step 2 are only done once when the system start-up with flow process consuming time, follow-uply do not need to repeat again these flow processs consuming time, thereby promoted the real-time video response speed of network video monitor and control system greatly.For example, the real-time video of Network Video Surveillance can be handled time-delay reduces more than 30% even 50%, greatly reduce the processing time-delay of network video monitor and control system, can reach time-delay when minimum only in a few tens of milliseconds or 200 milliseconds, such delay time has surpassed the vision response limit (about 1/10th seconds) that hdr video is checked soon, can make the people think that sensuously there is not time-delay in network video monitor and control system, solve a major defect of comparing with the simulation monitoring system.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is preferred embodiment of the present invention; be not to be used to limit protection scope of the present invention; within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1, a kind of video inspection method of network video monitor and control system is characterized in that, this method comprises:
Video monitoring management platform in the network video monitor and control system sends circulation to each headend equipment in advance and sends instructions, and notifies described headend equipment to begin to send video flowing to streaming media server;
When video viewing client-side is checked the video of specifying headend equipment at needs, send the request of checking of corresponding described appointment headend equipment to video monitoring management platform;
Video monitoring management platform is checked request according to described, and the video flowing of the described appointment headend equipment that the notification streams media server will receive is distributed to described video viewing client-side.
2, the method for claim 1 is characterized in that, described video monitoring management platform in advance forward end equipment send circulation send instructions for: when network video monitor and control system started, described video monitoring management platform forward end equipment sent to circulate and sends instructions;
Perhaps be: video monitoring management platform carries out the probability statistics that video is checked according to client, sends circulation at the time point of setting to each headend equipment and sends instructions.
3, a kind of network video monitor and control system comprises: headend equipment, video monitoring management platform, streaming media server and client, it is characterized in that,
Described video monitoring management platform is used for the circulation of forward end equipment transmission in advance and sends instructions, and notifies described headend equipment to send video flowing to streaming media server; After receive correspondence that client sends specify headend equipment check request after, send to divide to described streaming media server and send instructions, the video flowing of notifying the described appointment headend equipment that described streaming media server will receive is to being distributed to described client;
Described headend equipment is used for sending instructions according to the described circulation from video monitoring management platform, and the video flowing behind the capturing and coding is sent to streaming media server;
Client is used for when needs are checked the video of specifying headend equipment, sends the request of checking of corresponding described appointment headend equipment and the video flowing of receiving stream media server distribution to video monitoring management platform;
Streaming media server is used to receive the video flowing from headend equipment, and sends instructions according to the branch from video monitoring management platform, with the video flowing of the appointment headend equipment that receives to being distributed to clients corresponding.
4, network video monitor and control system as claimed in claim 3 is characterized in that, described video monitoring management platform comprises:
Pretreatment unit, be used for when network video monitor and control system starts, perhaps carrying out the setting-up time point that probability statistics that video checks obtain according to client, forward end equipment sends circulation and sends instructions, and notifies described headend equipment to send video flowing to streaming media server;
The real-time video response unit, be used to receive the request of checking of specifying headend equipment from the correspondence of client, check request according to described, send to divide to described streaming media server and send instructions, the video flowing of notifying the described appointment headend equipment that described streaming media server will receive is to being distributed to described client.
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