CN101340321A - Solution of adaptive bandwidth in real-time monitoring system - Google Patents
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- CN101340321A CN101340321A CNA2008101191551A CN200810119155A CN101340321A CN 101340321 A CN101340321 A CN 101340321A CN A2008101191551 A CNA2008101191551 A CN A2008101191551A CN 200810119155 A CN200810119155 A CN 200810119155A CN 101340321 A CN101340321 A CN 101340321A
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Abstract
The invention provides a self-adapting bandwidth method and a system thereof in a real-time monitoring system. The method comprises the following steps: a receiving terminal makes a dialog request facing to the terminal of a monitoring point for requiring to obtain the monitoring data of the terminal of the monitoring point; after the terminal of the monitoring point receives the request, the monitoring data is layered by using the layer coding technology, and the data is sent into a corresponding forwarding server, the data layer comprises a base layer and an enhancement layer, the terminal of the monitoring point sends partial or all data layers according to the difference of the capability of the uplink bandwidths, and the sent data layer at least comprises the base layer; the receiving terminal receives the proper data layer from a forwarding server according to the bandwidth capability, and the proper data layer at least comprises the base layer. The method and the system of the invention avoid the resource waste caused by the video or the audio with the same quality owned by the users of different bandwidths, and guarantee all users can enjoy different clarities when the video or the audio are displayed fluently.
Description
Technical field
The present invention relates to a kind of real-time monitoring system, relate in particular to a kind of adaptive bandwidth method that solves real-time monitoring system definition and fluency.
Background technology
In system for network video transmission, the Network Transmission bandwidth is the most valuable resource, and it directly determines the definition and the fluency of transmission of video, and is all the more so for real-time video transmission.Because the mode difference of user access network, network bandwidth resources is also inequality.For common ADSL user, upstream bandwidth is generally 512kbps, and downlink bandwidth is generally 1Mbps.For ADSL2+ user, upstream bandwidth can reach 1.5Mbps even higher.For the private network optical user, bandwidth can be higher.
The networking mode of real-time video monitoring system as shown in Figure 1, the video equipment of control point terminal is linked into video data in the wide area network and sends to the video management platform through uplink by user access point, and the video management platform sends to user terminal by wide area network by downlink with video data.
The bottleneck that influences video definition and fluency is that mainly video data transmits upstream to wide area network and video data downlinks to user terminal by wide area network.The up broadband and the downlink bandwidth of domestic consumer are limited, so transmitted data amount is limited.Can normally watch under the situation of video satisfying band-limited user, the higher user of bandwidth then can't make full use of the service that its bandwidth resources are enjoyed respective quality, causes the wasting of resources.
Therefore, how provide the service of different quality for the user of different bandwidth, Internet resources being accessed rationally utilize fully is that present network video monitor and control system has major issue to be solved.
Summary of the invention
The invention provides the adaptive bandwidth method in a kind of real-time monitoring system, purpose be make different bandwidth the user under the situation that satisfies real-time video or audio frequency smoothness, obtain different definition.
In first aspect, adaptive bandwidth method provided by the invention may further comprise the steps:
(1) receiving terminal is initiated the conversation request towards the control point terminal, requires to obtain the monitor data of described control point terminal;
(2) after the control point terminal receives request, use the hierarchical coding technology with the monitor data layering, and send in the corresponding forwarding server, described data Layer comprises basic layer and at least one enhancement layer;
(3) receiving terminal receives the data Layer that is fit to according to the bandwidth ability of oneself from forwarding server, and described suitable data Layer comprises basic layer.
In second aspect, adaptive bandwidth method provided by the invention may further comprise the steps:
(1) receiving terminal is initiated the conversation request towards the control point terminal, requires to obtain the monitor data of described control point terminal;
(2) after the control point terminal receives request, use the hierarchical coding technology with the monitor data layering, and send in the corresponding forwarding server, described data Layer comprises basic layer and at least one enhancement layer, the control point terminal is according to different part or the total data layers of sending of upstream bandwidth ability, and the data Layer of transmission comprises basic layer;
(3) receiving terminal receives data Layer from forwarding server, and this data Layer comprises basic layer.
In the third aspect, a kind of real-time monitoring system of adaptive bandwidth, comprise control point terminal and receiving terminal, it is characterized in that on the control point terminal, using the hierarchical coding technology with the monitor data layering, described data Layer comprises basic layer and at least one enhancement layer, and the control point terminal sends to data Layer in the corresponding forwarding server; Receiving terminal receives the data Layer that is fit to according to the bandwidth ability of oneself from forwarding server, and described suitable data Layer comprises basic layer.
In fourth aspect, a kind of real-time monitoring system of adaptive bandwidth, comprise control point terminal and receiving terminal, it is characterized in that on the control point terminal, using the hierarchical coding technology with the monitor data layering, described data Layer comprises basic layer and at least one enhancement layer, in corresponding forwarding server, the data Layer of transmission comprises basic layer to the control point terminal according to different part or the total data layers of sending of upstream bandwidth ability; Receiving terminal receives the data Layer that is fit to from forwarding server, and described suitable data Layer comprises basic layer.
The present invention is applied to the hierarchical coding technology in the real-time monitoring system, has avoided the user of different bandwidth to have the wasting of resources that video or audio frequency caused of equal in quality, and the demand of all user bandwidth adaptive networks has improved the performance of real-time monitoring system.
Description of drawings
Fig. 1 is a real-time video monitoring system networking schematic diagram;
Fig. 2 is the data forwarding mode schematic diagram of hierarchical coding technology of the present invention.
Embodiment
The present invention uses the hierarchical coding technology on the control point terminal, according to the upstream bandwidth situation video data is transmitted at the network higher slice, and receiving terminal selects part or total data layer to receive according to bandwidth situation, to reach the purpose of network bandwidth adaptive.
The hierarchical coding technology be meant with a frame video image be divided into several independently the layer encode, wherein comprise a basic layer and some enhancement layers, basic layer expression passed through the additional image detail of Network Transmission by the minimum image of network with acceptable mass transport when enhancement layer is represented to have enough remaining bandwidths available.By an every layer data size and an original frame data sizableness after the network hierarchy coding.Basic layer can be by independent decoding, also can be simultaneously decoded with enhancement layer.Enhancement layer can not be decoded separately, and the picture quality that the many more decodings of enhancement layer obtain is good more.
2 pairs of video data pass-through modes of the present invention embodiment is elaborated with reference to the accompanying drawings:
(1) the control point endpoint registration is to signal server;
(2) address of signal server notice control point terminal forwarding server;
(3) the control point terminal is selected forwarding server according to oneself network bandwidth ability and video encoding capability;
(4) receiving terminal initiates a session request to signal server (not shown), requires to watch the video of specifying the control point terminal;
(5) signal server notice control point terminal is initiated video session;
(6) the control point terminal sends to the video data layering in the corresponding forwarding server, simultaneously video transmission information is sent to signal server;
(7) signal server circulates a notice of the video information of this control point terminal and the address of forwarding server to receiving terminal;
(8) receiving terminal receives video data and the demonstration that is fit to according to the bandwidth ability of oneself.
In another embodiment, video data repeating process of the present invention is described as follows:
(1) the control point endpoint registration is to signal server;
(2) network bandwidth ability and the video encoding capability of control point terminal announcement signal server control point terminal;
(3) signal server is assigned forwarding server according to the network bandwidth ability and the video encoding capability of control point terminal to the control point terminal;
(4) receiving terminal initiates a session request to signal server, requires to watch the video of specifying the control point terminal;
(5) signal server notice control point terminal is initiated video session;
(6) the control point terminal sends to the video data layering in the corresponding forwarding server, simultaneously video transmission information is sent to signal server;
(7) signal server circulates a notice of the video information of this control point terminal and the address of forwarding server to receiving terminal;
(8) receiving terminal receives video data and the demonstration that is fit to according to the bandwidth ability of oneself.
In above two embodiment, the control point terminal sends to some or all of data Layer in the forwarding server by different connections according to the upstream bandwidth situation, must comprise basic layer in the data Layer of transmission.As shown in Figure 2, control point 1 is because upstream bandwidth is limited, only sent three figure layer data to forwarding server, wherein sent a base layer data of necessary transmission, sent an enhancement data respectively to forwarding server 2 and forwarding server 3 to forwarding server 1.Control point 2 is owing to have higher bandwidth, the data of five figure layers have been sent to forwarding server, wherein sent a base layer data of necessary transmission, sent an enhancement data respectively to forwarding server 2, forwarding server 3, forwarding server 4 and forwarding server 5 to forwarding server 1.
The some or all of data Layer that receiving terminal selects needs to receive according to the network bandwidth situation of oneself.Similarly, basic layer also must be received.As shown in Figure 2, receiving terminal 1 is because downlink bandwidth is higher, receive the data of five figure layers, comprising a base layer data from forwarding server 1 that must receive, receive a enhancement data simultaneously from forwarding server 2, from an enhancement data of forwarding server 3, from enhancement data of forwarding server 4 with from an enhancement data of forwarding server 5.Receiving terminal 2 is because downlink bandwidth is limited, can only receive the data of three figure layers, comprising a base layer data from forwarding server 1 that must receive, receive simultaneously from enhancement data of forwarding server 2 with from an enhancement data of forwarding server 3.The enhancement layer that receives is many more, and the image quality that obtains after decoded is good more.For the user of limited bandwidth, can select to receive only basic layer and part enhancement layer, in the sacrificial section definition, guaranteed the smoothness of its video like this, the user of bandwidth abundance can selective reception more data layer to obtain better video effect.
Preamble has schematically been described a plurality of different forwarding servers receptions and has been sent data, need to prove that these a plurality of different forwarding servers can be integrated on the hardware device.
By video data pass-through mode and control point terminal hierarchical coding technology as can be known, the control point terminal can send the video data of respective numbers according to the bandwidth situation of oneself, receiving terminal also can be according to the some or all of video data of bandwidth situation selective reception of oneself, thereby reaches the purpose of network bandwidth self adaptive.
The real-time video monitoring system of adaptive bandwidth of the present invention can be applied to convenience store, bank etc. needs real-time video monitoring and band-limited place.
Specific embodiments of the invention at be real-time video monitoring system, for the real-time audio supervisory control system, the bright adaptive bandwidth method of we is suitable for too.
Obviously, under the prerequisite that does not depart from true spirit of the present invention and scope, the present invention described here can have many variations.Therefore, the change that all it will be apparent to those skilled in the art that all should be included within the scope that these claims contain.The present invention's scope required for protection is only limited by described claims.
Claims (14)
1. the adaptive bandwidth method in the real-time monitoring system is characterized in that said method comprising the steps of:
(1) receiving terminal is initiated the conversation request towards the control point terminal, requires to obtain the monitor data of described control point terminal;
(2) after the control point terminal receives request, use the hierarchical coding technology with the monitor data layering, and send in the corresponding forwarding server, described data Layer comprises basic layer and at least one enhancement layer;
(3) receiving terminal receives the data Layer that is fit to according to the bandwidth ability of oneself from forwarding server, and described suitable data Layer comprises basic layer.
2. the adaptive bandwidth method in a kind of real-time monitoring system as claimed in claim 1 is characterized in that described step (1) comprises that receiving terminal initiates a session request to signal server, requires to obtain the monitor data of control point terminal; Signal server notice control point terminal initiation session.
3. the adaptive bandwidth method in a kind of real-time monitoring system as claimed in claim 2, it is characterized in that comprising that the control point terminal sends to signal server with data Layer transmission information, signal server circulates a notice of the address of the data message relevant with monitor data of control point terminal and forwarding server of step to receiving terminal.
4. the adaptive bandwidth method in a kind of real-time monitoring system as claimed in claim 1, it is characterized in that described data Layer comprises a plurality of enhancement layers, described step (2) comprises that the control point terminal is according to the different steps that send the enhancement layer of varying number of upstream bandwidth ability.
5. the adaptive bandwidth method in a kind of real-time monitoring system as claimed in claim 1 is characterized in that described real-time monitoring system is a real-time video monitoring system.
6. the adaptive bandwidth method in a kind of real-time monitoring system as claimed in claim 1 is characterized in that described real-time monitoring system is the real-time audio supervisory control system.
7. the adaptive bandwidth method in the real-time monitoring system is characterized in that said method comprising the steps of:
(1) receiving terminal is initiated the conversation request towards the control point terminal, requires to obtain the monitor data of described control point terminal;
(2) after the control point terminal receives request, use the hierarchical coding technology with the monitor data layering, and send in the corresponding forwarding server, described data Layer comprises basic layer and at least one enhancement layer, the control point terminal is according to different part or the total data layers of sending of upstream bandwidth ability, and the data Layer of transmission comprises basic layer;
(3) receiving terminal receives data Layer from forwarding server, and this data Layer comprises basic layer.
8. the adaptive bandwidth method in a kind of real-time monitoring system as claimed in claim 7 is characterized in that described step (1) comprises that receiving terminal initiates a session request to signal server, requires to obtain the monitor data of specifying the control point terminal; Signal server notice control point terminal initiation session.
9. the adaptive bandwidth method in a kind of real-time monitoring system as claimed in claim 7, it is characterized in that comprising that the control point terminal sends to signal server with data Layer transmission information, signal server circulates a notice of the address of the data message relevant with monitor data of control point terminal and forwarding server of step to receiving terminal.
10. the adaptive bandwidth method in a kind of real-time monitoring system as claimed in claim 7, it is characterized in that described data Layer comprises a plurality of enhancement layers, described step (3) comprises that receiving terminal receives the step of the enhancement layer of varying number according to downlink bandwidth ability difference.
11. the adaptive bandwidth method in a kind of real-time monitoring system as claimed in claim 7 is characterized in that described real-time monitoring system is a real-time video monitoring system.
12. the adaptive bandwidth method in a kind of real-time monitoring system as claimed in claim 7 is characterized in that described real-time monitoring system is the real-time audio supervisory control system.
13. the real-time monitoring system of an adaptive bandwidth, comprise control point terminal and receiving terminal, it is characterized in that on the control point terminal, using the hierarchical coding technology with the monitor data layering, described data Layer comprises basic layer and at least one enhancement layer, and the control point terminal sends to data Layer in the corresponding forwarding server; Receiving terminal receives the data Layer that is fit to according to the bandwidth ability of oneself from forwarding server, and described suitable data Layer comprises basic layer.
14. the real-time monitoring system of an adaptive bandwidth, comprise control point terminal and receiving terminal, it is characterized in that on the control point terminal, using the hierarchical coding technology with the monitor data layering, described data Layer comprises basic layer and at least one enhancement layer, in corresponding forwarding server, the data Layer of transmission comprises basic layer to the control point terminal according to different part or the total data layers of sending of upstream bandwidth ability; Receiving terminal receives the data Layer that is fit to from forwarding server, and described suitable data Layer comprises basic layer.
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