CN104052970B - The relative monitoring method of supervising device - Google Patents
The relative monitoring method of supervising device Download PDFInfo
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- CN104052970B CN104052970B CN201410270917.3A CN201410270917A CN104052970B CN 104052970 B CN104052970 B CN 104052970B CN 201410270917 A CN201410270917 A CN 201410270917A CN 104052970 B CN104052970 B CN 104052970B
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Abstract
The present invention discloses a kind of relative monitoring method of supervising device.Supervising device includes：Video Recorder, infrared detector and timer.Monitoring method comprises the steps of：Shoot vision signal crossfire one of corresponding with a monitoring range；An infrared ray trigger signal is produced using an infrared detector is selective in response to the state of the monitoring range；An idle period is calculated according to the infrared ray trigger signal；And the selective shooting quality for adjusting the vision signal crossfire according to the idle period.
Description
Technical field
The present invention relates to a kind of relative monitoring method of supervising device, and more particularly to a kind of adjust shoots quality
The relative monitoring method of supervising device.
Background technology
In recent years, monitoring system has become an important ring for modern public security and preservation measures.Supervised immediately except providing
Outside function, monitoring system also provides the function of making video recording, however, in vision signal crossfire (Streaming Media) caused by monitoring system,
The possible most of the time is all not change, nonsensical monitoring image, and it is empty that these monitoring images can take substantial amounts of storage
Between.The quality of immediately monitoring function, while the efficient data volume for reducing monitoring image are how taken into account, is a class to be solved
Topic.
The content of the invention
It is an object of the invention to take into account the quality of immediately monitoring function, while the efficient data for reducing monitoring image
The relative monitoring method of supervising device of amount.
Embodiments of the invention propose a kind of supervising device, it is characterised in that include：One Video Recorder, its shoot with
A vision signal crossfire corresponding to one monitoring range；One infrared detector, it is selected in response to the state of the monitoring range
Property produce an infrared ray trigger signal；And a timer, the Video Recorder and the infrared detector are electrically connected to, it is
Calculated according to the infrared ray trigger signal one it is idle during, and the Video Recorder according to this it is idle during and selectivity adjusts
The shooting quality of the vision signal crossfire.
Embodiments of the invention also propose a kind of monitoring method, it is characterised in that comprise the steps of：Shooting and a monitoring
A vision signal crossfire corresponding to scope；One is produced using an infrared detector is selective in response to the state of the monitoring range
Infrared ray trigger signal；An idle period is calculated according to the infrared ray trigger signal；And selected according to the idle period
Property adjusts the shooting quality of the vision signal crossfire.
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.
Brief description of the drawings
The schematic diagram of Fig. 1 monitoring systems；
The block diagram of Fig. 2 supervising devices；
The flow chart of Fig. 3 monitoring methods；
Fig. 4 uses the timing diagram of the embodiment of monitoring method；
Fig. 5 monitoring methods judge the thin portion flow chart that idle condition is set up.
Wherein, reference
The network 5 of supervising device 1
The Video Recorder 15 of server 3
The infrared detector 13 of timer 11
Step S11, S13, S15, S17, S151~S155, S157, S158
Embodiment
The structural principle and operation principle of the present invention are described in detail below in conjunction with the accompanying drawings：
Fig. 1 is referred to, it is the schematic diagram of monitoring system.In monitoring system, supervising device 1 needs to enter monitors environment
The continual shooting of row, and the vision signal crossfire (Streaming Media) that shooting is drawn is sent to server 3 by network 5.Or
Vision signal crossfire is stored in inside by supervising device 1.Below only by taking a supervising device as an example, but a monitoring system may
Comprising multiple supervising devices, this part can analogize and obtain therefore not be described in detail.
Fig. 2 is referred to, it is the block diagram of supervising device.Supervising device 1 includes：Video Recorder 15, infrared detection
Device 13, timer 11.Its Timer 11 is electrically connected to Video Recorder 15 and infrared detector 13.
Infrared detector 13 can be that passive infrared detector (Passive Infrared Sensor, is referred to as
PIR).Infrared detector 13 is selective in response to the state change of monitoring range to produce infrared ray trigger signal.For example, it is assumed that
Monitors environment is a room, and the camera lens of supervising device 1 and infrared detector 13 are towards room doorway.
When door is continuously off, infrared detector 13 can't produce infrared ray trigger signal.When door is opened process
In, infrared detector 13 senses different infrared ray distributions, thus starts to produce infrared ray trigger signal.If into room
User when going about, infrared ray trigger signal also persistently produces.If maintain an anchor into the user in room
Or withdrawn from a room a period of time, infrared ray trigger signal will stop producing.
As it was previously stated, infrared ray trigger signal can be used for representing the state change in monitors environment.Maintain to produce infrared ray
During trigger signal, represent the state in monitors environment and still persistently change.It is tired using timer 11 according to the conception of the present invention
During counting the stopping generation infrared ray trigger signal of infrared detector 13, and idle period T will be defined as during this periodidle.Shadow
As logger 15 shoots vision signal crossfire corresponding with monitoring range.In addition, the idle period calculated according to timer 11
Tidle, Video Recorder 15 will dynamic adjustment vision signal crossfire shooting quality.
Assuming that Video Recorder 15 provides two kinds of shooting qualities, the first shooting quality and the second shooting quality.Wherein first
Quality is shot better than the second shooting quality.The difference of first shooting quality and the second shooting quality, when can be shooting monitoring image
Compression ratio, and/or frame rate (frame rate) etc..Certainly, the first shooting quality shoots the difference of quality simultaneously with second
It is not limited.
During practical application, the first shooting quality can be set with the second shooting quality for preference or the purposes of user.
For ease of illustration, it is assumed hereinafter that first count takes the photograph quality as a default shooting quality, and the second shooting quality is an energy-conservation shooting product
Matter.
By taking compression ratio as an example, supervising device 1 can provide set-up function, allow user decide in its sole discretion default shooting quality with
The compression ratio of energy-conservation shooting quality.For example, default shooting quality can be set as by user, it is two points by monitoring image compression
One of, and it can be then 1/8th by monitoring image compression to save shooting quality.
Frame rate represents the quantity of the monitoring image in the unit interval.When therefore, using default shooting quality, image is represented
For logger 15 within the unit interval, the quantity for shooting the monitoring image drawn is more.When shooting quality using energy-conservation, image is represented
Logger 15 shoots the negligible amounts of the monitoring image drawn within the unit interval.
Fig. 3 assumes supervising device 1 when one starts shooting, first according to the default shooting quality shooting video letter set by user
Number crossfire.Afterwards, supervising device 1 by response to the establishment of idle condition whether, choose whether change vision signal crossfire shooting
Quality.
Fig. 3 is referred to, the flow chart of its monitoring method.First, the shooting quality of vision signal crossfire is set as (or dimension
Hold for) after default shooting quality (step S11), start shooting vision signal crossfire (step S13) corresponding with monitoring range.Connect
And judge whether idle condition is set up (step S15) according to infrared ray trigger signal.If step S15 judged result is negative,
(or being changed to) is then maintained with default shooting quality shooting vision signal crossfire (step S11, step S13).
On the other hand, if step S15 judged result is affirmative, the shooting quality of vision signal crossfire is set as
(or being maintained) energy-conservation shooting quality (step S17).Thereafter, supervising device 1 shoots vision signal crossfire to save shooting quality
(step S13).
Fig. 3 flow can be repeated in supervising device 1.Therefore, believed in supervising device 1 with saving shooting quality shooting video
During number crossfire, supervising device 1 can be once again according to idle period TidleLength, judge whether idle condition is set up (step S15).
If idle condition maintains to set up, the still no different shape (state does not change) of monitors environment, therefore shadow are represented
As logger 15 can continue to save shooting quality shooting vision signal crossfire (step S17, step S13).If idle condition is not
During establishment, represent monitors environment and state change occur, therefore Video Recorder 15 can change with default shooting quality shooting video letter
Number crossfire (step S11, step S13).
Certainly, the practice of such a selectivity adjustment shooting quality, can also arrange in pairs or groups other kinds of embodiment.For example, prison
Device 1 is controlled in start, using energy-conservation shooting quality shooting vision signal crossfire, if infrared detector 13 produces infrared ray and touched
After signalling, Video Recorder 15 is just changed to default shooting quality shooting vision signal crossfire.
According to the conception of the present invention, timer 11 can produce different levels in response to the generation situation of infrared ray trigger signal
Adjustment signal to Video Recorder 15.In addition, Video Recorder 15 dynamically changes shooting by response to the level of adjustment signal
Quality.
For example, after infrared ray trigger signal stops one section of period, when producing once again, timer 11 is except resetting
(reset) leave unused outside period, also the synchronous adjustment signal for producing high levels to Video Recorder 15.Video Recorder 15 is in reception
, will be with default shooting quality shooting vision signal crossfire after the adjustment signal of high levels.
Furthermore if during infrared ray trigger signal stops one section, but when idle condition is not set up yet, timer 11 is except holding
Continue outside accumulative idle period, also the adjustment signal of maintenance output high levels to Video Recorder 15.During this period, Video Recorder
15 maintain with default shooting quality shooting vision signal crossfire.
And for example, when infrared ray trigger signal stops one section of period, and makes idle condition establishment, timer 11 produces low level
Accurate adjustment signal is to Video Recorder 15.Video Recorder 15 will be shot after the adjustment signal of low level is received with saving
Quality shoots vision signal crossfire.
During practical application, the state change of monitors environment, it may occur however that in a flash, it is also possible to during maintaining one section.With
It is different the length of state change, infrared detector 13 is actual to produce during infrared ray trigger signal length also phase not to the utmost
Together.
Once infrared ray trigger signal starts to produce, timer 11 just suspends calculating idle period Tidle(it can also be returned
Zero).And timer 11 starts to calculate idle period T after infrared ray trigger signal terminatesidle.In other words, infrared ray is worked as
When trigger signal is longer during remaining caused, timer 11 stops calculating idle period TidleDuring it is also longer.
4th figure illustrates how to calculate idle period T according to infrared ray trigger signalidle, and how further basis
Idle period TidleJudge the concept whether idle condition is set up.It need to be noted that, it is infrared when being applied to supervising device 1
The generation time point of line trigger signal is not limited thereto.
The 4th figure is referred to, it is the timing diagram using the embodiment of monitoring method.This schema is from top to bottom respectively infrared
Line trigger signal and shooting quality.For purposes of illustration only, when shooting quality to preset shooting quality, with the net bottom table of higher levels
Show.In addition, the X direction of this schema represents the time.Idle threshold Tth can be set by user (such as：30 seconds, 5 minutes),
Or the reference settings of idle threshold are provided by the manufacturer of supervising device 1.
After supervising device 1 is started shooting by start time point T0, Video Recorder 15 is first with default shooting quality shooting video letter
Number crossfire.At the same time, timer 11 also starts to calculate idle period Tidle.Assuming that by start time point T0 to the first time point T1 phases
Between (period A) produced without any infrared ray trigger signal, then supervising device 1 still maintains to clap with default shooting quality in period A
Take the photograph vision signal crossfire.
Thereafter, in the first time point T1, the accumulative idle period T of timer 11idleIdle threshold Tth is reached.Therefore,
Supervising device 1 will determine that idle condition is set up in the first time point T1.Related, supervising device 1 changes to save after the first time point T1
Quality shooting vision signal crossfire can be shot.Now, timer 11 still maintains accumulative idle period Tidle。
It is next assumed that an infrared ray trigger signal results from the second time point T2, between the 3rd time point T3.Second time point T2
For starting time point, the end time point that the 3rd time point T3 is infrared ray trigger signal of infrared ray trigger signal.
In the second time point T2, infrared detector 13 senses the change of monitoring range generating state, thus produces infrared
Line trigger signal.Therefore, supervising device 1 will be by the second time point T2, with default shooting quality shooting vision signal crossfire.Such as
Shown in Fig. 4, by the first time point T1 to B during between the second time point T2, maintain the shooting quality setting of vision signal crossfire
Quality is shot for energy-conservation.
Between the second time point T2 and the 3rd time point T3, infrared detector 13 persistently produces infrared ray trigger signal.According to
This, timer 11 can also stop calculating idle period T between the second time point T2 and the 3rd time point T3idle.Therefore, photologging
Device 15 is maintained with default shooting quality shooting vision signal crossfire in period C.
Infrared ray trigger signal stops producing in the 3rd time point T3.From after the 3rd time point T3, during timer 11 would sit idle for
TidleReset.Afterwards, Video Recorder 15 is temporarily maintained with default shooting quality shooting vision signal crossfire.It can be seen by Fig. 4
Go out, from after the 3rd time point T3, Video Recorder 15 is in period D still using default shooting quality.
From after the 3rd time point T3, during the idle threshold Tth after, the 4th time point T4 in as Fig. 4.Now leave unused
Condition is set up once again, and Video Recorder 15 changes to save shooting quality shooting vision signal crossfire once again.
Fig. 5 is referred to, its monitoring method judges the thin portion flow chart that idle condition is set up.First determine whether the shape of monitoring range
Whether state changes (step S151).If step S151 judged result is affirmative, infrared detector 13 will produce infrared
Line trigger signal (step S152).Then, timer 11 will reset idle period Tidle(S154), and supervising device 1 judges the spare time
It is invalid (step S158) to put condition.
On the other hand, if step S151 judged result is negative, timer 11 will accumulative idle period Tidle(step
S157).Timer 11 simultaneously determines whether the idle period T added up at presentidleWhether idle threshold (step is more than or equal to
S153).If step S153 judged result is affirmative, represents idle condition and set up (step S155).If step S153 judgement
As a result it is negative, then timer 11 will determine that idle condition is invalid (step S158).
As seen from Figure 5, leave unused period TidleCalculating, can according to the generation of infrared ray trigger signal whether and determine
It is fixed.Such as：As described in step S157, when infrared ray trigger signal does not produce slowly, timer 11 persistently adds up idle period
Tidle.As described in step S154, after infrared ray trigger signal terminates, timer 11 resets idle period Tidle。
According to preceding description it is known that the supervising device 1 of the present invention, meeting is in response to idle period TidleLength, judge
Should be with which kind of shooting quality shooting vision signal crossfire.
When idle period TidleTth during more than or equal to idle threshold, monitors environment is represented for some time without special
Event occurs.Now, if maintaining, with default shooting quality shooting vision signal crossfire, may can only obtain the unconverted monitoring of milli
Image, such a monitoring image for not having special meaning, instead results in added burden during shooting.Therefore, Video Recorder 15 will
The shooting quality of vision signal crossfire is set as energy-conservation shooting quality.On the other hand, when infrared ray trigger signal is producing, though or
Right infrared ray trigger signal has stopped producing but idle period TidleDuring less than idle threshold, burst may be had by representing monitors environment
Situation.Now, Video Recorder 15 sets the shooting quality of vision signal crossfire as default shooting quality.
Monitoring method provided by the invention, the situation in response to monitors environment of dynamic, adjust the bat of vision signal crossfire
Take the photograph quality.Supervising device 1 can maintain good image quality in real needs carefully viewing monitoring image, and efficient
Reduction make video recording immediately required storage area.In addition, the frequency range of network transmission also can synchronization gain improvement with system power dissipation.
Certainly, the present invention can also have other various embodiments, ripe in the case of without departing substantially from spirit of the invention and its essence
Know those skilled in the art when can be made according to the present invention it is various it is corresponding change and deformation, but these corresponding change and become
Shape should all belong to the protection domain of appended claims of the invention.
Claims (5)
1. a kind of supervising device, it is characterised in that include：
One Video Recorder, it shoots a vision signal crossfire corresponding with a monitoring range, and according to an idle period and one
Idle threshold and judge whether an idle condition is set up, wherein, when being more than or equal to the idle threshold during this is idle, the spare time
Condition establishment is put, wherein, when the condition of leaving unused is invalid, the Video Recorder sets the shooting quality of the vision signal crossfire
For one first shooting quality；And when the condition of leaving unused is set up, the Video Recorder sets the shooting of the vision signal crossfire
Quality is one second shooting quality, and wherein the first shooting quality is better than the second shooting quality, and the idle threshold can be by making
User sets or provided by the manufacturer of supervising device；
One infrared detector, its in response to the monitoring range state and selectivity produce an infrared ray trigger signal；And
One timer, the Video Recorder and the infrared detector are electrically connected to, it adds up the infrared detector and stops production
The idle period is calculated during the life infrared ray trigger signal, and the Video Recorder is selective according to the idle period
The shooting quality of the vision signal crossfire is adjusted, wherein
In the starting time point of the infrared ray trigger signal, the timer stops calculating the idle period；And touched in the infrared ray
The end time point of signalling, the timer reset the idle period.
2. supervising device as claimed in claim 1, it is characterised in that the shooting quality of the vision signal crossfire corresponds to one
At least one of the quantity of those monitoring images in unit interval and the compression ratio of those monitoring images.
3. supervising device as claimed in claim 1, it is characterised in that the infrared detector is a passive infrared detection
Device.
A kind of 4. monitoring method, applied to a supervising device, it is characterised in that comprise the steps of：
A shooting vision signal crossfire corresponding with a monitoring range；
An infrared ray trigger signal is produced using an infrared detector is selective in response to the state of the monitoring range；
Add up during the infrared detector stops producing the infrared ray trigger signal and during calculating one is idle；And
According to this it is idle during with an idle threshold and judge whether an idle condition is set up, wherein, be more than when the idle period
Or equal to this leave unused threshold when, the idle condition is set up, wherein, when the condition of leaving unused is invalid, by the vision signal crossfire
Shooting quality be set as one first shooting quality；And when the condition of leaving unused is set up, by the shooting of the vision signal crossfire
Quality is set as one second shooting quality, and wherein the first shooting quality is better than the second shooting quality, and the idle threshold can
Set by user or provided by the manufacturer of supervising device.
5. monitoring method as claimed in claim 4, it is characterised in that it is single that the shooting quality of the vision signal crossfire corresponds to one
At least one of the quantity of those monitoring images in the time of position and the compression ratio of those monitoring images.
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