TWI400951B - Video surveillance recording system and method - Google Patents

Description

Video surveillance recording system and method

The invention relates to a monitoring system and method, in particular to a video monitoring recording system and method.

Monitoring systems have become the most effective monitoring tool in modern security and are widely used in communities, factories, banks and other places. The monitoring system instantly and truly reflects the state of the monitored object by means of the remote control camera and its auxiliary equipment (lens, pan/tilt, etc.), and can record the status.

In the monitoring state of 24 hours a day, the traditional monitoring system records the pictures taken by the monitor in real time. Therefore, a storage medium with a large storage capacity is required to record the picture information of the shooting, but the picture recorded on the storage medium Most of the information is static pictures, and these static picture materials are of little value for monitoring, thus wasting a lot of storage medium space.

In view of this, it is necessary to provide a video surveillance recording system that can selectively store dynamic pictures.

In addition, it is also necessary to provide a video surveillance recording method that can selectively store dynamic pictures.

A video monitoring and recording system includes: a camera device, a data processor, and a data storage device, wherein the camera device is configured to collect image data in the monitoring area, and transmit the image data to the data processor, and the data processor The received screen data is transferred to the data storage. The data processor includes a data detection and forwarding module and a control signal generation module; the data detection and forwarding module receives the picture data, and sequentially captures two frames of digital picture signals from the received picture data, and captures the captured two frames. The digital picture signal is transmitted to the control signal generating module, and the control signal generating module receives the two-frame digital picture signal, compares the two-frame digital picture signals to issue a pre-stored control signal, and the data storage selectively stores the picture according to the pre-stored control signal. data.

A video monitoring and recording method, the method comprising the steps of: capturing a picture in a monitoring area; acquiring a two-frame digital picture signal; determining whether the picture is a dynamic picture according to the acquired two-frame digital picture signal; generating a control signal according to the determination result; The control signal and the previously generated control signal perform a logical operation to generate a logical operation result; and a predetermined pre-stored control signal is issued according to the logical operation result to control whether the picture data is recorded.

By using the above video monitoring and recording system and method, the control signal generating module can determine whether the picture captured by the camera device is dynamic or static: when the picture is dynamic, the control signal generating module transmits the first pre-stored control signal to the data storage, the data The detection and forwarding module transmits the dynamic picture data to the data storage, and the data storage is based on the received first pre-stored control The signal generation starts to record the dynamic picture data; when the picture is static, the control signal generation module transmits the second pre-stored control signal to the data storage, and the data detection and forwarding module transmits the static picture data to the data storage, and the data storage is received according to the The second pre-stored control signal does not record static picture data. In this way, dynamic picture data is recorded in the data storage, thereby saving storage space of the storage medium.

Please refer to FIG. 1, which is a schematic structural diagram of a video surveillance recording system. The video surveillance recording system includes: an imaging device 10, a transmission device 12, a data processor 14, a display 16 and a data storage 18; wherein the data processor 14 and the transmission are respectively The device 12, the display 16 and the data storage 18 are connected, and the imaging device 10 is connected to the transmission device 12.

The camera device 10 is configured to collect screen data in the monitoring area, and transmit the collected screen data to the transmission device 12. The transmission device 12 is a signal transmission control interface that can transmit the picture data collected by the camera device 10 to the data processor 14.

The data processor 14 sequentially captures two frame digital picture signals from the received picture data, and compares the captured two frame digital picture signals to issue a pre-stored control signal, and the pre-stored control signal is output to the data memory 18.

The data processor 14 also distributes the received picture data into two paths, one picture material is provided to the display 16, and the other picture material is supplied to the material memory 18.

Please refer to FIG. 2, which is a video surveillance recording system of a preferred embodiment. The data processor 14 includes a data detection and forwarding module 142, a digital/analog conversion module 144, and a control signal generation module 146. The data storage 18 includes a data receiving module 182, a recording control module 184, and a database 186.

The data detection and forwarding module 142 receives the picture data transmitted by the transmission module 12, and forwards the received picture data to the digital/analog conversion module 144 and the data storage 18. The data detection and forwarding module 142 is further configured to capture two frames of digital picture signals from the received picture data, and transmit the captured two frames of digital picture signals to the control signal generation module 146. The control signal generating module 146 compares the received two-frame digital picture signals to issue different pre-stored control signals, and the data storage module 18 records or does not record picture data according to the received pre-stored control signals. The digital/analog conversion module 144 converts the received picture data into an analog picture signal and transmits it to the display 16 for display.

The data detection and forwarding module 142 includes a data receiving and forwarding unit 1421, a data capturing unit 1422, a first registering unit 1423, a timing unit 1424, and a counting unit 1425. The data capture unit 1422 is connected to the data receiving and forwarding unit 1421, the first registering unit 1423, and the timing unit 1424, respectively, and the counting unit 1425 is connected to the first registering unit 1423 and the timing unit 1424, respectively. The timing unit 1424 periodically transmits the trigger signal to the data capturing unit 1422 and the counting unit 1425 to control the working states of the data capturing unit 1422 and the counting unit 1425.

The data receiving and forwarding unit 1421 receives the picture data transmitted by the transmission device 12, and forwards the received picture data to the data receiving module 182 of the digital/analog conversion module 144 and the data storage 18.

After receiving the trigger signal provided by the timing unit 1424, the data capture unit 1422 starts capturing a frame digital picture signal from the data receiving and forwarding unit 1421, and transmits the captured one frame digital picture signal to the first registration unit 1423 for registration.

The initial value of the counter in the counting unit 1425 is 0, and the counting unit 1425 increments the counting value every time a trigger signal is received. When the counter counting value is a set value (in this embodiment, the value can be set to 2), the counting unit 1425 sends And transmitting a signal to the first register unit 1423, the first register unit 1423 transmitting the two-frame digital picture signal registered therein to the control signal generating module 146 according to the received transmission signal.

The control signal generation module 146 includes a first comparison unit 1461, a second registration unit 1462, a second comparison unit 1463, and a timing control unit 1464.

The first comparison unit 1461 is respectively connected to the first registration unit 1423, the second registration unit 1462, the second comparison unit 1463, the second registration unit 1462 is also connected to the second comparison unit 1463, and the timing control unit 1464 and the second comparison unit respectively 1463. The timing unit 1424 and the recording control module 184 are connected.

The first comparison unit 1461 of the control signal generation module 146 compares the received one-frame digital picture signal with the previous frame digital picture signal after the received two-frame digital picture signal to obtain a difference between the two-frame digital picture signals, and The difference is compared to a predetermined threshold. If the difference exceeds the threshold, the picture is considered to be a dynamic picture and a first control signal is generated; if the difference does not exceed the threshold, the picture is considered to be a static picture and a second control signal is generated. The first comparison unit 1461 transmits the generated control signal The second register unit 1462 is provided to the second register unit 1463.

The initial value of the second register unit 1462 is the second control signal, and the second register unit 1462 is used to register the received control signal. The second registration unit 1462 can also transmit the previously saved control signal to the second comparison unit 1463.

The second comparison unit 1463 performs a logical operation on the two received control signals, and the operation truth table is as follows:

The second comparison unit 1463 transmits the result of the logical operation to the timing control unit 1464. The first pre-stored control signal and the second pre-stored control signal are pre-stored in the timing control unit 1464. The timing control unit 1464 can select the pre-stored control signal to control the working state of the module unit connected thereto.

When the operation result received by the timing control unit 1464 is a true value, the timing control unit 1464 transmits the first pre-stored control signal to the recording control module 184, the timing control unit 1464 starts timing, and transmits the second pre-stored control signal to the data. The timing unit 1424 of the forwarding module 142 is detected, and the timing unit 1424 stops timing according to the received second pre-stored control signal. The timing control unit 1464 counts for a period of time, and the preferred time period in this embodiment After 1 minute, the timer control unit 1464 transmits the first pre-stored control signal to the timing unit 1424 after 1 minute, and the timing unit 1424 starts timing. When the operation result received by the timing control unit 1464 is a false value, the timing control unit 1464 performs only the operation of transmitting the second pre-stored control signal to the recording control module 184.

The record control module 184 generates a record control signal according to the received first and second pre-stored control signals, and controls the record of the database 186. That is, the recording control module 184 generates a first recording control signal according to the received first pre-stored control signal, generates a second recording control signal according to the received second pre-stored control signal, and transmits the first and second recording control signals. Give the database 186. If the first record control signal received by the database 186 is received, the database 186 begins to record the picture data; if the database 186 receives the second record control signal, the database 186 does not record the picture data.

In this embodiment, the data capture unit 1422, the first register unit 1423, the timing unit 1424, and the counting unit 1425 of the data detection and forwarding module 142 perform timing capture of the digital picture signal, and transmit the captured digital picture signal to the control. The operation of the signal generation module 146. The first comparison unit 1461, the second registration unit 1462, the second comparison unit 1463, and the timing control unit 1464 of the control signal generation module 146 are configured to complete the determination of the dynamic digital picture signal, and control the data memory 18 to record the picture data. Thus, most of the static picture material will not be recorded in the material storage 18, saving the storage space of the material storage 18.

Please refer to FIG. 3 , which is a functional structural diagram of a video surveillance recording system according to another preferred embodiment. The functional modules in the figure are the same as the functional modules of FIG. 2 , but only added to the data processor 14 . Video coding Module 148 removes recording control module 184 from data store 18.

The video encoding module 148 is respectively connected to the data receiving and forwarding unit 1421 of the data detecting and forwarding module 142, the data receiving module 182 of the data storage 18, and the timing control unit 1464 of the control signal generating module 146. The video encoding module 148 receives the screen data transferred by the data receiving and forwarding unit 1421. The video encoding module 148 encodes or not encodes the received picture data according to the first and second pre-stored control signals provided by the timing control unit 1464, and transmits the encoded picture data to the data receiving module 182.

The video encoding module 148 changes the working state according to the received pre-stored control signal: if the received signal is the first pre-stored control signal, it enters the encoding state, and starts to encode the picture data transmitted by the data detecting and forwarding unit 1421 to generate the encoding. The screen data is transmitted to the data receiving module 182, and the data receiving module 182 transmits the received encoded image data to the data library 186, and the data library 186 records the encoded image data; if the received signal is the second When the control signal is pre-stored, the encoding state is not entered, and the screen data transferred by the data detecting and forwarding unit 1421 is not encoded, so that no screen data is output to the data receiving module 182, and the database 186 stops the recording operation.

In this embodiment, the data capture unit 1422, the first register unit 1423, the timing unit 1424, and the counting unit 1425 of the data detection and forwarding module 142 perform timing capture of the digital picture signal, and transmit the captured digital picture signal to the control. The operation of the signal generation module 146. The first comparison unit 1461, the second registration unit 1462, the second comparison unit 1463, and the timing control unit 1464 of the control signal generation module 146 perform the determination of the dynamic digital picture signal, and control the video coding module 148 to dynamically The picture data is encoded, and the video encoding module 148 transfers the encoded picture data to the data storage 18 for recording. Thus, most of the static picture data will not be recorded in the material memory 18, and the dynamic picture data recorded in the data memory 18 is encoded and compressed, which saves the storage space of the data memory 18.

Please refer to FIG. 4, which is a flowchart of a method for video surveillance recording of a preferred embodiment. The steps are as follows:

In step S400, the screen in the monitoring area is taken.

Step S402, capturing two frame digital picture signals.

Step S404, comparing the two frames of digital image signals before and after to determine whether the picture is a dynamic picture.

Step S406, if the result of the determination is a dynamic picture, the first control signal is generated.

Step S408, the generated control signal is logically operated with the control signal generated by the previous judgment, and a logical operation result is generated.

Step S410: If the logical operation result is a true value, the first pre-stored control signal is sent.

Step S412, according to the first pre-stored control signal recording screen data, the process proceeds to step S402, and the two-frame digital screen is continuously acquired for comparison.

Step S414, if the logical operation result is a false value, the second pre-stored control signal is issued.

Step S416, the screen data is not recorded according to the second pre-stored control signal.

Step S418, if the result of the determination in step S404 is a static picture, the second control signal is generated, and the process proceeds to step S408, and the generated control signal is logically operated with the control signal generated by the previous judgment, and a logical operation result is generated. .

In step S420, it is judged whether the termination key is pressed. If the termination key is not pressed, the process jumps to step S402, and the two-frame digital screen is continuously acquired for comparison; if the termination key is pressed, the monitoring recording flow is ended.

In order to more clearly describe the method flow of the video surveillance recording of the preferred embodiment, the present invention provides a method flow as shown in FIG. FIG. 5 is a flow chart of a method for performing video surveillance recording by the video surveillance recording system shown in FIG. 2 and FIG. 3. The recording method is: the data detection and forwarding module 142 acquires the two-frame digital picture signal of the data frame, and the control signal generation module 146 determines whether the picture is a dynamic picture according to the received two-frame digital picture signal, and then generates the result according to the determination result. The control signal is further logically operated on the control signal generated before and after, and the result of the operation is judged to be a true value. Finally, the pre-stored control signal is selected according to the judgment result to control the recording state of the picture data by the data memory 18. The following are the specific steps of the video surveillance recording method:

In step S500, system power-on detection is performed.

In step S502, the detection result is abnormal, and the units of the system are not activated or the alarm state is entered.

In step S504, the detection result is normal, and the data receiving and forwarding unit 1421 of the data detecting and forwarding module 142 receives the picture data collected by the imaging device 10.

In step S506, the timing unit 1424 sends a trigger signal to the counting unit 1425 and the data capturing unit 1422, and starts timing. After receiving the trigger signal, the data capturing unit 1422 captures the first frame digital picture signal from the data receiving and forwarding unit 1421, and The first frame digital picture signal is registered in the first registration unit 1423. After the counting unit 1425 receives the trigger signal, the count value is incremented by one.

In step S508, the timing unit 1424 extends the predetermined time, and the length of the predetermined time delay is determined according to the sensitivity of the detection. After the delay arrives, the timing unit 1424 re-issues the trigger signal, and the trigger signal is transmitted to the data capturing unit 1422 and the counting unit 1425.

Step S510, after receiving the trigger signal, the data capturing unit 1422 captures the second frame digital picture signal from the data receiving and forwarding unit 1421, and registers the second frame digital picture signal in the first registration unit 1423. The counter count value of the counting unit 1425 is incremented by one.

In step S512, the counting unit 1425 sends a transmission signal to the first registration unit 1423. After receiving the transmission signal provided by the counting unit 1425, the first registration unit 1423 transmits the registered two-frame digital signal to the control signal generating module 146. The first comparison unit 1461. The count value of the counting unit 1425 is set to zero.

In step S514, the first comparing unit 1461 compares the subsequent frame digital picture signal with the previous frame digital picture signal to obtain a difference between the two frame digital picture signals.

In step S516, the obtained difference is compared with a preset threshold.

Step S518, if the difference between the signals of the two frame digital screen exceeds the threshold, then The picture is considered to be a dynamic picture, a first control signal is generated, and the first control signal is transmitted to the second registration unit 1462 and the second comparison unit 1463. The second register unit 1462 saves the received control signal and transmits the last saved control signal to the second comparison unit 1463.

In step S520, the second comparing unit 1463 performs a logical operation on the received two control signals, and transmits the result of the operation to the timing control unit 1464.

Step S522, if the operation result received by the timing control unit 1464 is a true value, the timing control unit 1464 transmits the pre-stored first pre-stored control signal to the recording control module 184.

In step S524, the recording control module 184 generates a first recording control signal according to the first pre-stored control signal, and the control database 186 records the screen data received from the data receiving and forwarding unit 1421.

In step S526, the timing control unit 1464 starts counting for a period of time, and transmits the pre-stored second pre-stored control signal to the timing unit 1424 of the data detection and forwarding module 142. The timing unit 1424 stops according to the received second pre-stored control signal. Timing, in the present embodiment, the preferred timing is 1 minute. After 1 minute, the timing control unit 1464 transmits the pre-stored first pre-stored signal to the timing unit 1424 to control the timing unit 1424 to start timing. Then, the process goes to step S506, and the two-frame digital picture is continuously acquired for comparison.

In step S528, if the comparison result in step 516 is that the difference between the two frame digital picture signals does not exceed the threshold, the picture is considered to be a static picture, and the first comparison unit 1461 generates a second control signal, and the process proceeds to step S520.

In step S530, if the operation result received by the timing control unit 1464 is a false value, the timing control unit 1464 only performs an operation of transmitting the pre-stored second pre-stored control signal to the recording control module 184.

In step S532, the recording control module 184 generates a second recording control signal according to the second pre-stored control signal, and the control database 186 does not record the picture data.

In step S534, it is determined whether the termination key is pressed. If the termination key is not pressed, the process jumps to step S506, and the two-frame digital screen is continuously acquired for comparison; if the termination key is pressed, the monitoring recording flow is ended.

With the above video surveillance recording system and method, the data processor can automatically determine whether the picture taken by the camera device is a dynamic picture, and encode the dynamic picture and record it. The data recorded on the storage medium is the encoded dynamic picture data, and most of the static picture data is not recorded, which saves the storage space of the storage medium.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above descriptions are only the preferred embodiments of the present invention, and those skilled in the art will be able to include equivalent modifications or variations in the spirit of the present invention.

10‧‧‧ camera

1421‧‧‧ Data receiving and forwarding unit

12‧‧‧Transportation device

1422‧‧‧ data capture unit

14‧‧‧ Data Processor

1423‧‧‧First registration unit

16‧‧‧ display

1424‧‧‧Time unit

18‧‧‧Data storage

1425‧‧‧counting unit

142‧‧‧Data Detection and Forwarding Module

1461‧‧‧ first comparison unit

144‧‧‧Digital/Analog Conversion Module

1462‧‧‧Second registration unit

146‧‧‧Control signal generation module

1463‧‧‧Second comparison unit

148‧‧‧Video Coding Module

1464‧‧‧Timed Control Unit

182‧‧‧ Data receiving module

184‧‧‧record control module

186‧‧‧Database

S400~S420‧‧‧Video monitoring record method flow steps

S500~S534‧‧‧Video monitoring and recording system for video surveillance recording method flow steps

FIG. 1 is a schematic structural diagram of a video monitoring and recording system.

2 is a schematic diagram showing the functional structure of a video surveillance recording system according to a preferred embodiment.

3 is a schematic diagram showing the functional structure of a video surveillance recording system according to another preferred embodiment.

4 is a flow chart of a method for video surveillance recording of a preferred embodiment.

FIG. 5 is a flow chart of a method for performing video surveillance recording by the video surveillance recording system shown in FIG. 2 and FIG. 3.

10‧‧‧ camera

1421‧‧‧ Data receiving and forwarding unit

12‧‧‧Transportation device

1422‧‧‧ data capture unit

14‧‧‧ Data Processor

1423‧‧‧First registration unit

16‧‧‧ display

1424‧‧‧Time unit

18‧‧‧Data storage

1425‧‧‧counting unit

142‧‧‧Data Detection and Forwarding Module

1461‧‧‧ first comparison unit

144‧‧‧Digital/Analog Conversion Module

1462‧‧‧Second registration unit

146‧‧‧Control signal generation module

1463‧‧‧Second comparison unit

182‧‧‧ Data receiving module

1464‧‧‧Timed Control Unit

184‧‧‧record control module

186‧‧‧Database

Claims (20)

A video surveillance recording system includes: an imaging device, a data processor, and a data storage device, wherein the camera device is configured to collect image data in a monitoring area, and transmit the image data to the data processor, wherein the improvement is: the data processing The device includes a data detection and forwarding module and a control signal generation module; the data detection and forwarding module receives the image data, and sequentially captures two frames of digital image signals from the received image data, and captures the captured image The two-frame digital signal is transmitted to the control signal generating module, the control signal generating module includes a first comparing unit, a second registering unit, a second comparing unit, and a timing control unit; the first comparing unit receives the two frames of digits a picture signal, comparing the two frame digital picture signals to obtain a control signal, and transmitting the control signal to the second registration unit to register, and transmitting the control signal to the second comparison unit; the second comparison The unit further receives the second registration unit to transmit the control signal previously registered, and receives the second control signal OK logical operation; the timing control unit issues a control signal in accordance with pre-stored logic operation result of the second comparing unit generates the data memory selectively storing the picture data based on the stored control signal. The video surveillance recording system of claim 1, wherein the data detection and forwarding module receives the image data and forwards the received image data to the data storage. The video surveillance recording system of claim 1, wherein the data detection and forwarding module comprises a data capture unit and a first registration unit, wherein the data capture unit is configured to capture the digital image signal and capture the captured image. The digital picture signal is transmitted to the first registration unit to register, the first registration unit The digital signal signal registered is transmitted to the control signal generating module. The video surveillance recording system of claim 3, wherein the data detection and forwarding module comprises a data receiving and forwarding unit, the data receiving and forwarding unit receives the picture data, and forwards the picture data to the data storage. The video surveillance recording system of claim 4, wherein the data capture unit captures the two-frame digital picture signal from the data receiving and forwarding unit. The video surveillance recording system of claim 3, wherein the data detection and forwarding module further comprises a counting unit, wherein when the data capturing unit captures a frame of the digital signal, the counting value of the counting unit is increased by one. The video surveillance recording system of claim 6, wherein when the count value of the counting unit is a set value, a transmission signal is generated to control the first registration unit to transmit the registered digital screen signal to the Control signal generation module. The video surveillance recording system of claim 6, wherein the data detection and forwarding module further comprises a timing unit, configured to periodically control a capture operation of the data capture unit. The video surveillance recording system of claim 8, wherein the timing unit is configured to periodically control the counting operation of the counting unit. The video surveillance recording system of claim 9, wherein the pre-stored control signal is used to control a timing operation of the timing unit of the data detection and forwarding module. The video surveillance recording system of claim 1, wherein the data processor further comprises a video encoding module, wherein the video encoding module is respectively connected to the data detecting and forwarding module and the control signal generating module. Video editing The code module encodes the dynamic picture data transferred by the data detection and forwarding module according to the pre-stored control signal transmitted by the control signal generation module, and transmits the generated coded picture data to the data storage. The video surveillance recording system of claim 1, wherein the data storage device comprises a data receiving module, a data base and a recording control module, and the data receiving module receives the image data transmitted by the data processor, and Transmitting the screen data to the database, the recording control module receiving the pre-stored control signal provided by the control signal generating module, and thereby generating a recording control signal to control whether the database records the received image data . The video surveillance recording system of claim 1, wherein the video surveillance recording system further comprises a display, the display receiving the screen data transferred by the data detection and forwarding module, and displaying the screen data. The video surveillance recording system of claim 13, wherein the data processor further comprises a digital/analog conversion module, and the digital/analog conversion module is connected to the data detection and forwarding module and the display, The digital/analog conversion module converts the received picture data into an analog picture signal and transmits it to the display for display. A video monitoring and recording method comprises the steps of: taking in a picture in a monitoring area; acquiring a two-frame digital picture signal; determining whether the picture is a dynamic picture according to the obtained two-frame digital picture signal; generating a control signal according to the determination result; the control signal Performing a logical operation with the previously generated control signal to generate a logical operation result; and issuing a predetermined pre-stored control signal according to the logical operation result to control the Whether the screen material is recorded. The video surveillance recording method of claim 15, further comprising: delaying a predetermined time between acquiring two frame digital picture signals. The video surveillance recording method of claim 15, further comprising: comparing the two frame digital picture signals to generate a difference. The video surveillance recording method of claim 17, further comprising: comparing the generated difference with a preset threshold to generate a control signal. The video surveillance recording method of claim 15, further comprising: if the logical operation result is the first value, issuing a predetermined first pre-stored control signal; and recording the picture data according to the first pre-stored control signal. The video surveillance recording method of claim 15, further comprising: if the logical operation result is the second value, issuing a predetermined second pre-stored control signal; and not recording the picture data according to the second pre-stored control signal.