CN101001360A - Automatic control circuit and method of video monitoring system - Google Patents
Automatic control circuit and method of video monitoring system Download PDFInfo
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- CN101001360A CN101001360A CN 200710072912 CN200710072912A CN101001360A CN 101001360 A CN101001360 A CN 101001360A CN 200710072912 CN200710072912 CN 200710072912 CN 200710072912 A CN200710072912 A CN 200710072912A CN 101001360 A CN101001360 A CN 101001360A
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Abstract
This invention discloses an automatic control circuit and a method for a video monitor system, in which, the control circuit includes a camera device, a coding device, an evident movement macro-block amount valve value comparator, a storage device, a decoding device and a display device, and the camera device is connected with the coding device, said comparator is connected with the coding device and the storage device, said storage device, the decoding device and the display device are connected orderly, which can either record abnormal situations accurately or save stored resources and energy.
Description
[technical field]
The present invention relates generally to the video monitoring system field, especially the technical field of the automatic control of video monitoring system.
[background technology]
Fig. 1 is the structured flowchart of conventional video surveillance system, and this conventional video surveillance system comprises camera, encoder, memory, decoder and display, and this camera, encoder, memory, decoder and display link to each other successively.
Current, the conventional video surveillance system need record and store lot of data, and this brings two problems:
Problem 1: the precision that supposition is recorded is 720 wide 480 high YUV420, and per second 30 hardwoods used typical MPEG compression ratio 100: 1, and then 24 hours every days, the needs data quantity stored was 720 * 480 * 1.5 * 30 * 60 * 60 * 24/100=13.5GB.Under modern disk storage technology, such data volume all will consume a hard disk at least weekly;
Problem 2: big like this memory space does not tell directly whether supervision department abnormal conditions have taken place, when abnormal conditions have taken place, and the whole data of recording need be scanned in supervision department, extract Useful Information, consume lot of manpower and material resources, run counter to the original meaning that video monitoring is saved manpower.
The problem of conventional video surveillance system is that encoder is recorded a large amount of useless information to memory, and the storage resources of the preciousness that had both consumed has like this been obscured useful abnormal conditions again.Therefore the key of dealing with problems is that encoder is controlled, and allows encoder only record work under abnormal conditions.Existing a kind of settling mode is: add abnormal conditions monitoring-storage switch between encoder and memory, it as shown in Figure 2.What record in this way all is Useful Information, has saved memory space and monitor's time.
Abnormal conditions monitoring-storage switch adopts rate bit stream threshold values comparator usually at present, as shown in Figure 3.This solution is that the code flow of encoder is analyzed, and the decision-making of abnormal conditions is commonly defined as code flow greater than a threshold values: when code flow during greater than threshold values, memory is stored; When code flow during less than threshold values, memory cuts out storage.
Yet this solution has produced two new problems.New problem 1: first frame had fresh target to occur when abnormal conditions occurred, and can cause the short-term code flow to increase considerably; Each two field picture is because good motion compensation subsequently, code flow keeps less than threshold values, the abnormal conditions monitor be difficult to judge the increase of short-term code stream be because abnormal conditions cause or since ambient noise cause, if be judged as abnormal conditions, started storage record, can not judge when abnormal conditions finish and close the storage record but start storage record back system; New problem 2: target entered picture at a slow speed frame by frame when abnormal conditions occurred, this moment, system cooperated outstanding motion compensation, can keep the code stream not significantly increase of amount all the time, like this under the abnormal conditions, monitor can not start, and causes irretrievable loss to the user.
Therefore, the reliability of existing solution exists than major defect, needs a kind of new video monitoring system to solve above problem.
[summary of the invention]
The object of the present invention is to provide a kind of video monitoring system automatic control circuit.
Another object of the present invention provides a kind of video monitoring system autocontrol method.
In order to solve the problems of the technologies described above, the technical solution used in the present invention comprises a kind of video monitoring system automatic control circuit, comprise camera head, code device, obvious motion number of macroblocks threshold values comparator, storage device, decoding device, display unit, described camera head links to each other with code device, described obvious motion number of macroblocks threshold values comparator links to each other with code device and storage device respectively, and described storage device, decoding device and display unit connect successively.
In technical scheme of the present invention, described obvious motion number of macroblocks threshold values comparator compares the quantity of the macro block of the obvious motion in every frame picture in the encoder, when obviously the quantity of the macro block of motion is greater than threshold values in every frame picture, obviously motion number of macroblocks threshold values comparator prompting memory starts the storage record, when obviously the quantity of the macro block of motion was less than threshold values in every frame picture, obviously motion number of macroblocks threshold values comparator prompting memory was not stored record.
In technical scheme of the present invention, described macro block is for to be divided into some matrix area with original image, and each zone is called macro block.
In technical scheme of the present invention, described macro block obviously motion has significant change for macro block in the position of adjacent picture frame.
In technical scheme of the present invention, described camera head is a camera, and code device is an encoder, and storage device is a memory, and decoding device is a decoder, and display unit is a display.
The technical solution used in the present invention also comprises a kind of video monitoring system autocontrol method, and this method may further comprise the steps: steps A: camera head sends to encoder with the scene information that absorbs and encodes; Step B: code device is encoded the information that receives and is sent to obvious motion number of macroblocks threshold values comparator; Rapid C: obviously whether motion number of macroblocks threshold values comparator judges in the frame picture that receives obviously the quantity of the macro block of motion greater than threshold values, if greater than threshold values then enter step D, if less than threshold values then enter step e; Step D: obviously motion number of macroblocks threshold values comparator prompting storage device starts the storage record; Step e: obviously motion number of macroblocks threshold values comparator prompting storage device is not stored record.Described camera head is a camera, and code device is an encoder, and storage device is a memory.
Adopt technique scheme, in conjunction with the following embodiment that will describe in detail, beneficial technical effects of the present invention is: video monitoring system automatic control circuit of the present invention and method adopt obvious motion number of macroblocks threshold values comparator, when abnormal conditions occur, obviously motion number of macroblocks threshold values comparator prompting memory starts the storage record, after abnormal conditions finish, obviously motion number of macroblocks threshold values comparator prompting memory is not stored record, what memory was recorded all is useful information, the storage resources of the preciousness that can consume so neither, useful abnormal conditions can have not been obscured again, improved the reliability of video monitoring system, in addition, under non-abnormal conditions, only start the motion compensation units of encoder, technical scheme of the present invention has also been saved power consumption.
Feature of the present invention and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.
[description of drawings]
Fig. 1 represents the structured flowchart of conventional video surveillance system;
Fig. 2 is illustrated in the structured flowchart that abnormal conditions monitoring-storage switch is installed in the conventional video surveillance system;
Fig. 3 represents the existing structured flowchart that rate bit stream threshold values comparator is installed in the conventional video surveillance system;
Fig. 4 represents the structured flowchart of video monitoring system automatic control circuit of the present invention;
Fig. 5 represents the flow chart of video monitoring system autocontrol method of the present invention.
[embodiment]
Be illustrated in figure 4 as the structured flowchart of video monitoring system automatic control circuit of the present invention.This system comprises camera, encoder, obvious motion number of macroblocks threshold values comparator, memory, decoder and display.Wherein, in obvious motion number of macroblocks threshold values comparator, a macro block is defined as original image is divided into some matrix area, these zones that form matrix are generally rectangle, also can be hexagon, each zone be called macro block, for example with the picture material of original image 16 * 16; The obvious movement definition of macro block is that macro block has significant change in the position of adjacent picture frame, and abnormal conditions are defined as the quantity of the macro block that obvious motion is arranged in the frame picture greater than threshold values.
The operation principle of video monitoring system automatic control circuit of the present invention is: this camera will obtain to such an extent that scene information is issued encoder, and encoder sends to obvious motion number of macroblocks threshold values comparator after the information that receives is encoded.Obviously motion number of macroblocks threshold values comparator compares the quantity of the macro block of the obvious motion in every frame picture in the encoder, when obviously the quantity of the macro block of motion is greater than threshold values in every frame picture, obviously motion number of macroblocks threshold values comparator prompting memory starts the storage record, when obviously the quantity of the macro block of motion was less than threshold values in every frame picture, obviously motion number of macroblocks threshold values comparator prompting memory was not stored record.
Video monitoring system automatic control circuit of the present invention has solved existing employing rate bit stream threshold values comparator and the new problem that produces.For new problem 1, video monitoring system automatic control circuit of the present invention is to solve like this: when abnormal conditions occurred, this moment, first frame had fresh target to occur, and can cause the short-term code flow to increase considerably; Each frame is because the good motion compensation of encoder subsequently, code flow keeps less than threshold values, but in this case, the quantity that the macro block of obvious motion is arranged in every frame picture still is greater than threshold values, obviously motion number of macroblocks threshold values comparator prompting memory starts the storage record, after abnormal conditions finished, the quantity of macro block that obvious motion is arranged in every frame picture was less than threshold values, and obviously motion number of macroblocks threshold values comparator prompting memory is not stored record.
For new problem 2, video monitoring system automatic control circuit of the present invention is to solve like this: target entered picture at a slow speed frame by frame when abnormal conditions occurred, because the outstanding motion compensation of encoder, can keep the code stream not significantly increase of amount all the time, but, in this case, the quantity that the macro block of obvious motion is arranged in every frame picture still is greater than threshold values, obviously motion number of macroblocks threshold values comparator prompting memory starts the storage record, after abnormal conditions finish, the quantity of macro block that obvious motion is arranged in every frame picture is less than threshold values, and obviously motion number of macroblocks threshold values comparator prompting memory is not stored record.
The present invention also provides a kind of video monitoring system method of control automatically, sees also Fig. 5.This video monitoring system method of control automatically may further comprise the steps:
Step 200: camera sends to encoder with the scene information that absorbs and encodes;
Step 210: encoder is encoded the information that receives and is sent to obvious motion number of macroblocks threshold values comparator;
Step 220: obviously whether motion number of macroblocks threshold values comparator judges in the frame picture that receives obviously the quantity of the macro block of motion greater than threshold values, if greater than threshold values then enter step 240, if less than threshold values then enter step 250;
Step 230: obviously motion number of macroblocks threshold values comparator prompting memory starts the storage record;
Step 240: obviously motion number of macroblocks threshold values comparator prompting memory is not stored record.
The above; only for the preferable concrete true mode of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (9)
1, a kind of video monitoring system automatic control circuit, comprise camera head, code device, storage device, decoding device, display unit, it is characterized in that: also comprise obvious motion number of macroblocks threshold values comparator, described camera head links to each other with code device, described obvious motion number of macroblocks threshold values comparator links to each other with code device and storage device respectively, and described storage device, decoding device and display unit connect successively.
2, video monitoring system automatic control circuit as claimed in claim 1, it is characterized in that: described obvious motion number of macroblocks threshold values comparator compares the quantity of the macro block of the obvious motion in every frame picture in the encoder, when obviously the quantity of the macro block of motion is greater than threshold values in every frame picture, obviously motion number of macroblocks threshold values comparator prompting memory starts the storage record, when obviously the quantity of the macro block of motion was less than threshold values in every frame picture, obviously motion number of macroblocks threshold values comparator prompting memory was not stored record.
3, video monitoring system automatic control circuit as claimed in claim 2 is characterized in that: described macro block is for to be divided into some matrix area with original image, and each zone is called macro block.
4, video monitoring system automatic control circuit as claimed in claim 2 is characterized in that: described macro block obviously motion has significant change for macro block in the position of adjacent picture frame.
5, as each described video monitoring system automatic control circuit in the claim 1 to 4, it is characterized in that: described camera head is a camera, and code device is an encoder, and storage device is a memory, and decoding device is a decoder.
6, a kind of video monitoring system autocontrol method, this method may further comprise the steps:
Steps A: camera head sends to encoder with the scene information that absorbs and encodes;
Step B: code device is encoded the information that receives and is sent to obvious motion number of macroblocks threshold values comparator;
Step C: obviously whether motion number of macroblocks threshold values comparator judges in the frame picture that receives obviously the quantity of the macro block of motion greater than threshold values, if greater than threshold values then enter step D, if less than threshold values then enter step e;
Step D: obviously motion number of macroblocks threshold values comparator prompting storage device starts the storage record;
Step e: obviously motion number of macroblocks threshold values comparator prompting storage device is not stored record.
7, video monitoring system autocontrol method as claimed in claim 6 is characterized in that: described macro block is for to be divided into some matrix area with original image, and each zone is called macro block.
8, video monitoring system autocontrol method as claimed in claim 6 is characterized in that: described macro block obviously motion has significant change for macro block in the position of adjacent picture frame.
9, as each described video monitoring system autocontrol method in the claim 6 to 8, it is characterized in that: described camera head is a camera, and code device is an encoder, and storage device is a memory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710072912 CN101001360A (en) | 2007-01-05 | 2007-01-05 | Automatic control circuit and method of video monitoring system |
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| CN 200710072912 CN101001360A (en) | 2007-01-05 | 2007-01-05 | Automatic control circuit and method of video monitoring system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102075735A (en) * | 2011-01-14 | 2011-05-25 | 深圳职业技术学院 | Video monitoring data transmission method and video monitoring terminal |
| CN104792795A (en) * | 2015-04-30 | 2015-07-22 | 无锡英斯特微电子有限公司 | Image testing method of optical mouse chip |
| CN106331644A (en) * | 2016-09-07 | 2017-01-11 | 中车唐山机车车辆有限公司 | Video monitoring method, device and train monitoring system |
| CN107481226A (en) * | 2017-07-27 | 2017-12-15 | 沈阳东软医疗系统有限公司 | Remove the method, apparatus and PET system of exception scan data |
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2007
- 2007-01-05 CN CN 200710072912 patent/CN101001360A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102075735A (en) * | 2011-01-14 | 2011-05-25 | 深圳职业技术学院 | Video monitoring data transmission method and video monitoring terminal |
| CN104792795A (en) * | 2015-04-30 | 2015-07-22 | 无锡英斯特微电子有限公司 | Image testing method of optical mouse chip |
| CN106331644A (en) * | 2016-09-07 | 2017-01-11 | 中车唐山机车车辆有限公司 | Video monitoring method, device and train monitoring system |
| CN107481226A (en) * | 2017-07-27 | 2017-12-15 | 沈阳东软医疗系统有限公司 | Remove the method, apparatus and PET system of exception scan data |
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