CN102045544A - Video monitoring system and video data transmission method thereof - Google Patents

Video monitoring system and video data transmission method thereof Download PDF

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Publication number
CN102045544A
CN102045544A CN2010105415440A CN201010541544A CN102045544A CN 102045544 A CN102045544 A CN 102045544A CN 2010105415440 A CN2010105415440 A CN 2010105415440A CN 201010541544 A CN201010541544 A CN 201010541544A CN 102045544 A CN102045544 A CN 102045544A
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China
Prior art keywords
alarm
moving target
transmission
region
alert event
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CN2010105415440A
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Chinese (zh)
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高飞
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无锡中星微电子有限公司
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Priority to CN2010105415440A priority Critical patent/CN102045544A/en
Publication of CN102045544A publication Critical patent/CN102045544A/en

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Abstract

The invention provides a video monitoring system. The video monitoring system comprises an acquisition unit, a detection unit, an analysis unit, a coding unit, a synthesis unit and a transmission unit, wherein the acquisition unit is used for acquiring a frame image; the detection unit detects a movement object of the frame image; the analysis unit analyzes whether the detected movement object triggers an alarm event or not, and forms an alarm information with an alarm grade when the detected movement object triggers the alarm event; the coding unit codes the frame image; the synthesis unit merges and packages the alarm information and the corresponding coded frame image into a data packet and sets the transmission grade of the corresponding data packet according to the alarm grade of the alarm information; and the transmission unit adjusts the transmission mode according to the transmission grade of the data packet so as to transmit the data packet. When broadband resources are crowded, the image with alarm information can be transmitted to a receiving terminal preferentially.

Description

The transmission method of a kind of video monitoring system and video data thereof

[technical field]

The present invention relates to the multimedia application field, particularly relate to the transmission method of a kind of video monitoring system and video data thereof.

[background technology]

Along with the development of information technology, video surveillance applications is in growing field, as bank, hospital and traffic etc.And video monitoring has video baseband transmission, Optical Fiber Transmission, Network Transmission, microwave transmission, twisted-pair feeder balance transmission and wideband six kinds of transmission meanss of cable transmission altogether at present.

Wherein, described video baseband transmission transmission range is short, and is bigger for high fdrequency component decay more than 300 meters, can't guarantee picture quality; Optical Fiber Transmission is along with the increase cost of transmission range also can increase; Microwave transmission is subjected to outside electromagnetic interference and is subjected to the influence of other environment such as weather bigger; The twisted-pair feeder balance transmission can only solve 1km with interior monitoring image, and twisted-pair feeder can only the transmission of one line image, be not suitable for being applied in the big-and-middle-sized monitoring, the fragile ageing resistance of twisted-pair feeder quality is poor, be unsuitable for open-air transmission, and because the high fdrequency component decay is bigger, color of image can be subjected to very big loss; Wideband cable transmission altogether adopts the weak signal transmission, and the wideband modulated terminal need add the 220V AC power, and the control point does not possess this condition mostly at present.Because the shortcoming that above-mentioned several transmission means exists, present most popular video monitoring transmission means then is a Network Transmission.

Described Network Transmission decay is little, interference free performance is best, and cost is relatively low, but described Network Transmission also has a defective to be exactly: when lot of data is transmitted on network, cause that easily seizing broadband resource causes problems such as the time delay of loss of data, transmission and obstruction.If when having a large amount of video monitoring datas to transmit like this, then probably make partial data lose or postpone because of broadband resource is crowded, that is to say, some video monitoring data can't normally be transferred to monitoring client, especially when alert event takes place, warning message is not transferred to monitoring client in time or is lost in the process of transmission, and video monitoring has also just lost meaning so.

Therefore being necessary to propose a kind of new technical scheme solves the problems referred to above.

[summary of the invention]

The purpose of this part is to summarize some aspects of embodiments of the invention and briefly introduces some preferred embodiments.In this part and the application's specification digest and denomination of invention, may do a little simplification or omit avoiding the making purpose of this part, specification digest and denomination of invention fuzzy, and this simplification or omit and can not be used to limit the scope of the invention.

The object of the present invention is to provide the transmission method of a kind of video monitoring system and video data thereof, its warning message and frame of video that will have alarm level is merged into the packet with grade of transmission, grade of transmission according to packet is adjusted transmission means, when broadband resource is crowded, the packet that the prioritised transmission alarm level is high.

According to an aspect of the present invention, the invention provides a kind of video monitoring system, it comprises that it comprises: collecting unit is used for the acquisition frame image; Detecting unit carries out moving object detection to described two field picture; Analytic unit, analyzing and testing to moving target whether triggered alert event, then form warning message when triggering alert event with alarm level; Coding unit is encoded to described two field picture; Synthesis unit is packaged into packet with the corresponding two field picture merging behind described warning message and the coding, and the grade of transmission of corresponding data bag is set according to the alarm level of warning message; Transmission unit is adjusted transmission means to transmit described packet according to the grade of transmission of described packet.

Further, described detecting unit obtains the circumscribed rectangular region of moving target behind detected moving target, described analytic unit two field picture is provided with alarm region, described alarm region has corresponding alarm level, and described analytic unit compares the circumscribed rectangular region and the described alarm region of detected moving target to determine whether to have triggered alert event.

Further, when the circumscribed rectangular region of described moving target and described alarm region intersect, judge that then described moving target has triggered alert event.

Further, described warning message comprises the circumscribed rectangular region of the moving target that triggers alert event first, triggers difference, the alarm region that is triggered of the circumscribed rectangular region of circumscribed rectangular region when triggering alert event first of moving target of alert event and the alarm level of the alarm region that triggered once more.

Further, the grade of transmission of described packet is set to identical with the alarm level of corresponding warning message.

Further, the high packet of described transmission unit prioritised transmission grade.

According to a further aspect in the invention, the invention provides a kind of data transmission method of video monitoring system, it comprises: the acquisition frame image also carries out motion target detection to described image; Analyzing and testing to moving target whether triggered alert event, then form warning message when triggering alert event with alarm level; Described two field picture is encoded, then data behind the described coding and warning message merging are packaged into the packet with grade of transmission, adjust transmission means to transmit described packet according to the grade of transmission of described packet.

Further, described warning message comprises the circumscribed rectangular region of the moving target that triggers alert event first, triggers difference, the alarm region of corresponding triggering and the alarm level of alarm region of the circumscribed rectangular region of circumscribed rectangular region when triggering alert event first of the moving target of alert event once more.

Further, image is carried out obtaining after the moving object detection circumscribed rectangular region of moving target, two field picture is provided with alarm region, described alarm region has corresponding alarm level, the circumscribed rectangular region and the described alarm region of detected moving target are compared, to determine whether to have triggered alert event.

Further, when the circumscribed rectangular region of described moving target and described alarm region intersect, judge that then described moving target has triggered alert event.

Further, described warning message comprises the circumscribed rectangular region of the moving target that triggers alert event first, triggers difference, the alarm region that is triggered of the circumscribed rectangular region of circumscribed rectangular region when triggering alert event first of moving target of alert event and the alarm level of the alarm region that triggered once more.

Further, according to the alarm level of described packet transmits data packets successively from high to low.

Compared with prior art, the video frame images that collects is encoded by system with video Data Transmission of warning message of the present invention, and described video frame images is carried out the analysis of alert event, data after will encoding afterwards and alert event analysis obtain the warning message merging and are packaged into the packet with alarm level, adjust transmission means with the high packet of prioritised transmission grade according to the grade of transmission of packet.When broadband resource was crowded, prioritised transmission produced the packet of alert event, abandons the packet that does not produce alert event.

[description of drawings]

In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.Wherein:

Fig. 1 is video monitoring system structural representation in one embodiment among the present invention;

Fig. 2 triggers scene schematic diagram in one embodiment for reporting to the police among the present invention; With

Fig. 3 is the transmission method structural representation in one embodiment of video data in the video monitoring system among the present invention.

[embodiment]

Detailed description of the present invention is mainly come the running of direct or indirect simulation technical solution of the present invention by program, step, logical block, process or other symbolistic descriptions.Be the thorough the present invention that understands, in ensuing description, stated a lot of specific detail.And when not having these specific detail, the present invention then may still can realize.Affiliated those of skill in the art use these descriptions herein and state that the others skilled in the art in affiliated field effectively introduce their work essence.In other words, be the purpose of the present invention of avoiding confusion, because the understanding easily of method of knowing and program, so they are not described in detail.

Alleged herein " embodiment " or " embodiment " are meant special characteristic, structure or the characteristic that can be contained at least one implementation of the present invention.Different in this manual local " in one embodiment " that occur not are all to refer to same embodiment, neither be independent or optionally mutually exclusive with other embodiment embodiment.In addition, represent the sequence of modules in method, flow chart or the functional block diagram of one or more embodiment and revocablely refer to any particular order, also be not construed as limiting the invention.

The invention provides a kind of system with video Data Transmission of warning message, it carries out the analysis of alert event and to the different transfer level of level setting of the alert event that produces, realizes the reliable transmission of other packet of high-transmission level like this according to different transfer levels in consulting network QOS (Quality of Service) the data that monitor.Its concrete structure can be referring to shown in Figure 1.

Fig. 1 is system's structural representation in one embodiment of the video Data Transmission with warning message among the present invention.Described system 100 with video Data Transmission of warning message comprises collecting unit 110, detecting unit 120, analytic unit 130, coding unit 140, synthesis unit 150 and transmission unit 160.

Described collecting unit 110 comprises at least one collecting device, as camera, is used for the two field picture of acquisition monitoring scene.In general supervisory control system, have a lot of cameras usually, to be used for gathering respectively the image of different scenes.

120 pairs of described two field pictures that collect of described detecting unit carry out motion target detection, as detect the personnel that walk about or mobile automobile etc.

Described analytic unit 130 analyzing and testing to moving target whether triggered alert event, then form warning message when triggering alert event with alarm level.

Described analytic unit 130 at first obtains the circumscribed rectangular region of detected described moving target, and in the described two field picture that collects, be provided with alarm region, described alarm region has corresponding alarm level, described analytic unit 130 compares the circumscribed rectangular region and the described alarm region of detected moving target, to determine whether to have triggered the alarm level of alert event and alert event.

Generally, described alarm region can be line or invasion more, and wherein each alarm region can corresponding different alarm level.In one embodiment, described analytic unit 130 compares circumscribed rectangular region and each alarm region of moving target in the two field picture, judge whether the circumscribed rectangular region of described moving target and the invasion zone of described alarm region produce common factor, produce the alert event of the alarm region representative that occurs simultaneously with it if exist the then described moving target that occurs simultaneously then to trigger, and produce corresponding alarm level; Or the boundary line that whether the moving target circumscribed rectangular region contacted or crossed alarm region in the calculating two field picture, then produce alert event as if contacting or surpassed the warning boundary line with alarm region, and the same alarm level that produces correspondence.

In one embodiment, see also shown in Figure 2ly, Fig. 2 triggers scene schematic diagram in one embodiment for reporting to the police among the present invention.Contain three moving targets in this scene, i.e. moving target A, moving target B and moving target C; Three alarm regions are respectively warning boundary line A1, alarm region B1 and alarm region B2; Wherein moving target enters into the alarm level of alert event of alarm region B1 for the highest, be designated as first alarm level, the alarm level of alert event that enters into alarm region B2 is for taking second place, be designated as second alarm level, the alarm level of crossing the alert event of warning boundary line A1 is minimum, is designated as the 3rd alarm level.Judge according to the zone of described moving target circumscribed rectangular region and each alarm region whether each moving target triggers warning.The method of utilizing above-mentioned analysis whether to trigger alert event can learn that the circumscribed rectangular region of the moving target B among the figure and alarm region B2 produce common factor, that is to say the alert event that one second alarm level has taken place, promptly moving target B enters in the alarm region B2.Equally, for moving target C, the circumscribed rectangular region of described moving target C and warning boundary line A1 intersect, and then the alert event of the 3rd alarm level has taken place account for motion target C.And the circumscribed rectangular region of the moving target A among Fig. 2 produces common factor with any alarm region, also intersects or surpass line more with warning boundary line A1, and the incident that described moving target A produces is safe incident.

After analyzing alert event, then note the warning message in this image, wherein said warning message comprises: trigger the circumscribed rectangular region of the moving target of alert event, alarm region that this moving target triggered first and the alarm level of the alarm region that triggered, or the alarm level of the difference of circumscribed rectangular region, this moving target of triggering the moving target of alert event first circumscribed rectangular region when triggering the circumscribed rectangular region of alert event once more and triggering alert event first, the corresponding alarm region that is triggered and the alarm region that triggered.That is to say, need write down its circumscribed rectangular region to the moving target that triggers alert event first, the circumscribed rectangular region that then only needs record its this moment when a same moving target still triggers alert event in the next frame and the difference of the circumscribed rectangular region in the previous frame.

In one embodiment, in the N two field picture, contain two the moving target Obj_1 and Obj_2 and first alarm region and second alarm region that trigger alert event first, wherein moving target Obj_1 triggers first alarm region, moving target Obj_2 triggers second alarm region, and then the warning message of record comprises first: circumscribed rectangular region (being designated as Rect (Obj_2)), first alarm region and second alarm region of the circumscribed rectangular region of moving target Obj_1 (being designated as Rect (Obj_1)), moving target Obj_21.In the warning message of N+1 two field picture, described moving target Obj_1 still triggers first alarm region, and moving target Obj_2 no longer triggers alert event, there is a moving target Obj_3 to trigger the 3rd alarm region, then record still triggers difference and the new boundary rectangle Rect (Obj_3) that trigger the moving target Obj_3 that report to the police of the boundary rectangle of the moving target Obj_1 that reports to the police at N frame and N+1 two field picture, just the circumscribed rectangular region that all triggers the moving target Obj_1 of warning at N frame and N+1 frame is carried out differential coding, this differential coding information is designated as DifRect (Obj_1).At this moment, warning message then comprises: DifRect (Obj_1), Rect (Obj_3) and first alarm region, the 3rd alarm region.Like this, when in two two field pictures, triggering alert event before and after the same moving target, after the warning message of image the time only need transmit the difference of the circumscribed rectangular region of this moving target in two two field pictures of front and back in transmission, the receiving terminal when receiving warning message according to this moving target get circumscribed rectangular region in the two field picture of front and back difference and on described moving target boundary rectangle in the warning message (warning message in the image the preceding) obtain the circumscribed rectangular region of this moving target in this warning message, then reduced the amount of information of video data encoding, thereby further reduced demand the broadband.

Usually, reach an agreement in order to make the receiving terminal and to send data terminal, promptly allow the receiving terminal after receiving data, know whether to have taken place the concrete alert event of alert event or generation, the then general concrete parameter that need know the alarm region correspondence in the receiving terminal when communicating by letter first is as the position of invasion and regional extent etc.Whether the concrete alert event of alert event and generation when receiving warning message once more, the receiving terminal has just taken place so as can be known.As, the receiving terminal learn first alarm region with and regional extent, when receiving warning message that transmission comes the circumscribed rectangular region Rect (Obj_1) of one moving target Obj_1 is arranged, at this moment just can learn according to the regional extent of the moving target circumscribed rectangular region Rect (Obj_1) and first alarm region that initially obtains whether moving target Obj_1 has triggered the alert event that alarm region 1 is identified.

Described coding unit 140 is used for the two field picture of video monitoring that described collecting unit 110 is collected and encodes.

The warning message of the correspondence that described synthesis unit 150 produces the video data and the described analytic unit 130 of described coding unit 140 codings merges and is packaged into packet.In one embodiment, the described packet that merges after packing contains coding section and the section of reporting to the police, compressed video data behind the wherein said coding section memory encoding can be that frame data also can be the multiframe data, and described warning Duan Ze deposits the warning message of this section video.Described synthesis unit 150 can also be set the grade of transmission of described packet according to the alarm level of warning message in it.The alarm level height of its interior warning message, then the grade of transmission of this packet setting is also just high, and alarm level of warning message is low in it, and then the grade of transmission of this packet setting is also just low, has guaranteed that like this grade of transmission and alarm level are synchronous.

The described packet of described transmission unit 160 transmission, it can adjust transmission means according to the grade of transmission of packet.General, described transmission unit 160 according to the grade of transmission of packet having the described packet of transmission on the negotiation network QOS of differentiated services, so that the video data that alarm level is high is transferred to the receiving terminal reliably.In one embodiment, the negotiation network QOS can preferentially be chosen grade of transmission higher data bag according to the grade of transmission of described packet and transmit, when the broadband is very crowded, described negotiation network QOS may abandon not having the packet of alert event generation, and only transmits the packet with alert event.

Advantage of the present invention, characteristics or benefit are: form the warning message with alarm level when detected two field picture has the generation alert event, and warning message is packaged into packet with the coded data of corresponding two field picture, come the corresponding packet of selectivity transmission according to the alarm level of warning message in it, thereby can guarantee under the situation that network broadband crowds that the high video-frequency band of alarm level that will have alert event is transferred to monitoring client reliably.

Fig. 3 is the flow chart of the method for the video Data Transmission that has warning message among the present invention, and described method with video Data Transmission of warning message comprises:

Step 310, the acquisition frame image.In concrete the application, can carry out collection by a plurality of cameras to monitoring scene.

Step 320 is carried out motion target detection to described two field picture.

Step 330, analyzing and testing to moving target whether triggered alert event, as triggered alert event and then produced warning message with alarm level.

At first obtain the circumscribed rectangular region of detected described moving target, and in the described two field picture that collects, be provided with alarm region, described alarm region has corresponding alarm level, circumscribed rectangular region and described alarm region with detected moving target compares then, to determine whether to have triggered alert event.

In concrete the application, described alarm region can also can be an alarm threshold for invading the zone, and to each alarm region different alarm level can be set.In one embodiment, can calculate the invasion zone in described detected moving target circumscribed rectangular region and the alarm region, and calculate whether described moving target circumscribed rectangular region is occured simultaneously with the generation of invasion zone, if produce and to occur simultaneously then that the account for motion target has triggered alert event, and according to producing the i.e. grade of warning message for this reason of the corresponding alarm level in the invasion zone of occuring simultaneously with it.In another embodiment, can calculate the common factor of detected moving target circumscribed rectangular region and described alarm threshold, or whether described motion target area surpassed alarm threshold and entered into alarm region, as produce occur simultaneously or surpass alarm threshold then show as described in moving target triggered alert event.

Triggering the warning message of alert event first is different with the warning message that obtains once more, general, the warning message that triggers alert event first comprises the circumscribed rectangular region of the moving target that triggers alert event first, alarm region that this moving target triggered and the alarm level of the alarm region that triggered; And the difference of the circumscribed rectangular region of the warning message that obtains once more when comprising the circumscribed rectangular region of the moving target that triggers alert event once more and triggering alert event first, corresponding triggering alarm region and the grade of alarm region are obtained warning message.

In a specific embodiment, in the N two field picture, contain two the moving target Obj_1 and Obj_2 and first alarm region and second alarm region that trigger alert event first, wherein moving target Obj_1 triggers first alarm region, moving target Obj_2 triggers second alarm region, and then the warning message of record comprises first: boundary rectangle (being designated as Rect (Obj_2)), first alarm region and second alarm region of the circumscribed rectangular region of moving target Obj_1 (being designated as Rect (Obj_1)), moving target Obj_2; In the warning message of N+1 two field picture, described moving target Obj_1 still triggers first alarm region, and moving target Obj_2 no longer triggers alert event, there is a moving target Obj_3 to trigger the 3rd alarm region, then record still triggers difference and the new boundary rectangle Rect(Obj_3 that trigger the moving target Obj_3 that report to the police of the boundary rectangle of the moving target Obj_1 that reports to the police at N frame and N+1 two field picture), just the moving target Obj_1 circumscribed rectangular region that all triggers warning at N frame and N+1 frame is carried out differential coding, differential coding information is designated as DifRect (Obj_1).At this moment, warning message then comprises: DifRect (Obj_1), Rect (Obj_3) and first alarm region, the 3rd alarm region.Like this receiving terminal when receiving warning message according to the difference of moving target circumscribed rectangular region and on then can obtain the circumscribed rectangular region of moving target in this warning message behind the described moving target boundary rectangle in warning message, thereby reduced the amount of information of video data encoding, and then further reduced demand the broadband.

It should be noted that in warning message it is not need to put down in writing the moving target boundary rectangle that does not trigger alert event in the two field picture, the alarm region that is not triggered and corresponding alarm level.As, in the frame that alert event takes place first, moving target Obj_1 and Obj_2 trigger alarm region A and alarm region B respectively, and wherein the alarm level of alarm region A and alarm region B correspondence is respectively first alarm level and second alarm level; In the next frame image, only there is moving target Obj_1 to trigger alarm region A once more, and moving target Obj_2 does not trigger alert event, then Ci Shi warning message only comprises the difference of moving target A in two two field pictures, i.e. DifRect (Obj_1) and alarm region A (Obj_1) and the first corresponding alarm level.

In order to realize receiving terminal and the transmitting terminal common recognition to alert event, when communicating by letter first, the concrete parameter of alarm region correspondence is known in the receiving terminal, comprises the zone and the alarm level of alarm region.Receiving a warning message like this, then can directly analyze moving target and trigger which alarm region.

Step 340 is encoded to the two field picture of monitoring, promptly the video frame images that collects in the monitoring scene is encoded into the form that is applicable to transmission.

Step 350 is packaged into the packet with grade of transmission with data behind the described coding and warning message merging, and promptly packet comprises coding section and the section of reporting to the police.Compressed video data behind the wherein said coding section memory encoding, can also can the data of multiple image for the data of a two field picture, data in the described section of reporting to the police are the warning message of corresponding described coding section video, the grade of transmission of the alarm level setting data bag that it can have according to warning message in it.Being specifically as follows grade of transmission, to be set to it corresponding alarm level identical.Be the alarm level height of its interior warning message, then the setting of the grade of transmission of this packet is also just high, and alarm level of warning message is low in it, and then the setting of the grade of transmission of this packet is also just low, has guaranteed that like this grade of transmission and alarm level are synchronous.

Step 360 is adjusted the way of output to transmit described packet according to the grade of transmission of described packet.

It is specially: the grade of transmission according to described packet is adjusted the way of output, as transmitting just that grade of transmission is high high priority data transmission according to grade of transmission from high to low successively.General, at the grade of transmission of packet, adopt QOS network to transmit with differentiated services.In one embodiment, the negotiation network QOS can preferentially be chosen grade of transmission higher data bag according to the grade of transmission of described packet and preferentially transmit, when broadband resource is very crowded, described negotiation network QOS may abandon not having the packet of alert event generation, and only transmits the packet with alert event.When broadband resource is crowded, then can has the packet of alert event, and abandon the packet that does not have alert event like this according to the grade of transmission transmission.

In sum, whether the present invention at first produces alert event in the analysis frame image, as produce alert event and then write down warning message, and warning message and corresponding frame merged be packaged into packet with in the QOS transmission over networks with grade of transmission, thereby realized when broadband resource is crowded, having the data of alert event according to the grade of transmission prioritised transmission.

Above-mentioned explanation has fully disclosed the specific embodiment of the present invention.It is pointed out that and be familiar with the scope that any change that the person skilled in art does the specific embodiment of the present invention does not all break away from claims of the present invention.Correspondingly, the scope of claim of the present invention also is not limited only to previous embodiment.

Claims (12)

1. video monitoring system is characterized in that it comprises:
Collecting unit is used for the acquisition frame image;
Detecting unit carries out moving object detection to described two field picture;
Analytic unit, analyzing and testing to moving target whether triggered alert event, then form warning message when triggering alert event with alarm level;
Coding unit is encoded to described two field picture;
Synthesis unit is packaged into packet with the corresponding two field picture merging behind described warning message and the coding, and the grade of transmission of corresponding data bag is set according to the alarm level of warning message; With
Transmission unit is adjusted transmission means to transmit described packet according to the grade of transmission of described packet.
2. video monitoring system according to claim 1 is characterized in that:
Described detecting unit obtains the circumscribed rectangular region of moving target behind detected moving target,
Described analytic unit two field picture is provided with alarm region, described alarm region has corresponding alarm level, and described analytic unit compares the circumscribed rectangular region and the described alarm region of detected moving target to determine whether to have triggered alert event.
3. video monitoring system according to claim 2 is characterized in that:
When the circumscribed rectangular region of described moving target and described alarm region intersect, judge that then described moving target has triggered alert event.
4. video monitoring system according to claim 2 is characterized in that:
Described warning message comprises the circumscribed rectangular region of the moving target that triggers alert event first, triggers difference, the alarm region that is triggered of the circumscribed rectangular region of circumscribed rectangular region when triggering alert event first of moving target of alert event and the alarm level of the alarm region that triggered once more.
5. video monitoring system according to claim 1 is characterized in that: the grade of transmission of described packet is set to identical with the alarm level of corresponding warning message.
6. video monitoring system according to claim 1 is characterized in that: the high packet of described transmission unit prioritised transmission grade.
7. the data transmission method of a video monitoring system is characterized in that, it comprises:
The acquisition frame image also carries out motion target detection to described image;
Analyzing and testing to moving target whether triggered alert event, then form warning message when triggering alert event with alarm level;
Described two field picture is encoded, then data behind the described coding and warning message merging are packaged into the packet with grade of transmission, adjust transmission means to transmit described packet according to the grade of transmission of described packet.
8. the data transmission method of video monitoring system according to claim 7 is characterized in that: described warning message comprises the circumscribed rectangular region of the moving target that triggers alert event first, triggers difference, the alarm region of corresponding triggering and the alarm level of alarm region of the circumscribed rectangular region of circumscribed rectangular region when triggering alert event first of the moving target of alert event once more.
9. the data transmission method of video monitoring system according to claim 8 is characterized in that:
Image is carried out obtaining after the moving object detection circumscribed rectangular region of moving target,
Two field picture is provided with alarm region, and described alarm region has corresponding alarm level, the circumscribed rectangular region and the described alarm region of detected moving target is compared, to determine whether to have triggered alert event.
10. the data transmission method of video monitoring system according to claim 9 is characterized in that:
When the circumscribed rectangular region of described moving target and described alarm region intersect, judge that then described moving target has triggered alert event.
11. the data transmission method of video monitoring system according to claim 9 is characterized in that:
Described warning message comprises the circumscribed rectangular region of the moving target that triggers alert event first, triggers difference, the alarm region that is triggered of the circumscribed rectangular region of circumscribed rectangular region when triggering alert event first of moving target of alert event and the alarm level of the alarm region that triggered once more.
12. the data transmission method of video monitoring system according to claim 8 is characterized in that: according to the alarm level of described packet transmits data packets successively from high to low.
CN2010105415440A 2010-11-10 2010-11-10 Video monitoring system and video data transmission method thereof CN102045544A (en)

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