[ Huaqiang Security Network News ]
The technical control is very interested in the network video surveillance system solution, because the knowledge here is the process of turning the theoretical knowledge into the actual operation. The following is a small series for everyone to introduce the network video surveillance system program, we are divided into three parts for everyone. Introduction.
Network Video Surveillance System Solution I. System Topology Diagram Network Video Surveillance System Solution II. System Connection This solution design configures the central server platform in the central computer room, which is responsible for converging, forwarding, and distributing the video code stream of each front-end monitoring point, and complete the system. Management control functions.
The system not only has the function of switching and controlling the images on the network, but also has image processing and image decompression. On the one hand, the central server of the system should record the video information for the server, and store it for later viewing and on-demand broadcasting. image. On the other hand, on-demand broadcasting of users with authority in the receiving network, sending undecoded audio and video information to the user's computer, decoding by the user's computer, realizing monitoring images and sounds to the desktop, leading and related staff's computers After logging in, you can view the surveillance image and perform operations on the remote camera.
The central platform management software on the central server can also implement client access, front-end access, user privilege grading, log query, alarm linkage setting, and voice interaction.
The front-end video server completes the acquisition and encoding of video, audio, alarm and other signals and provides an integrated front-end device for transmission. In addition, the system supports alarm linkage. When the current end generates an alarm, the system automatically pops up the video source cut screen of the alarm according to the alarm linkage setting, and simultaneously performs alarm recording. In the construction of the front-end monitoring points, different transmission modes and erection options are selected according to the actual site environment.
Network selection: The front-end encoding device (digital hard disk recorder) supports IP network access and can be accessed through multiple lines, such as fiber, LAN, ADSL, etc. The construction of the project uses broadband LAN lines to connect the remote storage area to the Internet using the carrier network. On the one hand, the line deployment is timely and convenient. On the other hand, the current line bandwidth can meet the video bandwidth requirements.
Network video monitoring system program three, system function
1, video surveillance
Video and audio collection: Under the premise of ensuring real-time and image quality, the image can reach 4/8/12/16/32 channels of synchronous video and audio due to the mature MPEG4/H.264 image decoding technology. Acquisition, compression, storage, network transmission, playback, standard resolution 352 × 288 maximum resolution up to 704 × 576 real-time, transmission rate can be adaptively changed according to network conditions between 1-25 frames / sec; 60-180M hard disk space (including video and audio) is required, and the bandwidth required for network transmission is adjustable from 64K to 2M.
Multi-screen display: client monitoring video window can be freely switched to select 1, 4, 6, 8, 9, 16, 32, 64 screens with the same screen display; a certain video is enlarged to single screen display; the video display area is displayed full screen ; Arranging the display position of each screen, etc.
Cloud mirror control: Cloud mirror control can realize the left, right, up and down direction of the pan/tilt, automatic patrol; control lens zoom, focus, aperture adjustment; control lighting, wiper and other auxiliary equipment.
Picture quality adjustment: You can adjust the brightness, color, contrast, and saturation of the current video window image;
Picture round robin: The system has a video auto-patrol function, which performs image inspection on all front-end monitoring points within a set interval time. The participating inspection objects can be arbitrarily selected, and the switching interval time can be set.
Preset position: The system can control the definition, storage and recall of the high-speed dome preset position, and can patrol according to the preset sequence, which can realize multi-site remote control quickly.
Subtitle overlay: The location name and time can be superimposed on each image.
Both B/S and C/S mode access are supported.
2, alarm function
Fault alarm: It can identify alarm types such as “device disconnection†and “device connectionâ€, and can output through sound, light and other equipment.
Motion detection alarm: A fixed monitoring area can be selected, the alarm can be automatically recognized and linked, and the sensitivity of the identification can be adjusted arbitrarily.
Alarm input alarm: "temperature", "fire alarm", "smoke", "infrared", "motion detection", "digital input" and other alarm inputs.
The system has the function of receiving the alarm priority. When there is an alarm, the system automatically terminates any other work and gives priority to the alarm information.
The system has alarm check, response confirmation, and review function.
The system has alarm information linkage control function. When one of the alarms has an alarm, the system can trigger corresponding actions according to the rules set in advance, including starting image recording, starting alarm input, sound and light prompting administrator, sending SMS, automatic telephone. Call, pop up live video.
The alarm information can be stored, transmitted, and queried; it can help the public security organs to solve the case in the future.
3, video playback
Video storage: The system provides four recording strategies: timed recording, alarm recording, manual recording and motion detection recording. It can set the compression ratio, frame rate and save time of the recording; support front-end storage, local storage and centralized server storage.
Picture capture: It can realize manual capture, alarm trigger capture image function.
Video search: Video recording can be searched on all monitoring terminals with a user name with search authority. The video search can retrieve video records according to different query conditions such as date, monitoring location and alarm type.
Video playback: The retrieved image records can be played back in actual size or full screen mode, and the playback speed can be played back in normal, fast and slow speed.
The storage time can be set according to the maximum capacity of the system, and the data exceeding the storage time is automatically cycled over time.
4, voice interaction
Voice intercom: The system can support the voice intercom function of the central dispatch center and the sub-station and front-end interaction points. The volume can be adjusted to set the monitor and talkback functions to be turned on and off.
5, data query
Historical video query: Video search can retrieve video records according to different query conditions such as date, monitoring location and alarm type.
Alarm information inquiry: The alarm information can be queried according to the date, monitoring location and other conditions.
Log query: You can query log information such as "front-end connection", "user operation", "node configuration", "user configuration", and "system operation".
Server status query: You can view information such as the running status of the server, disk usage, network communication, and processes.
6, TV wall placement
If the number of monitoring screens far exceeds the number of monitors on the TV wall, the system also provides the function of the TV wall wheel to display all the images of interest on the TV wall in a specified time. The digital matrix in the system provides this function. The digital matrix is ​​responsible for restoring digitally compressed images forwarded by the digital video network management server to analog images, which are displayed on multiple monitors or large screens.
7, system management
User management: maintenance operations such as account opening, modification, deletion, and password modification of multi-user accounts;
Rights management: Multiple levels of management rights such as administrators and general users can be set, and unauthorized users cannot log in to the system.
The technical control is very interested in the network video surveillance system solution, because the knowledge here is the process of turning the theoretical knowledge into the actual operation. The following is a small series for everyone to introduce the network video surveillance system program, we are divided into three parts for everyone. Introduction.
Network video monitoring system program introduction
Network Video Surveillance System Solution I. System Topology Diagram Network Video Surveillance System Solution II. System Connection This solution design configures the central server platform in the central computer room, which is responsible for converging, forwarding, and distributing the video code stream of each front-end monitoring point, and complete the system. Management control functions.
The system not only has the function of switching and controlling the images on the network, but also has image processing and image decompression. On the one hand, the central server of the system should record the video information for the server, and store it for later viewing and on-demand broadcasting. image. On the other hand, on-demand broadcasting of users with authority in the receiving network, sending undecoded audio and video information to the user's computer, decoding by the user's computer, realizing monitoring images and sounds to the desktop, leading and related staff's computers After logging in, you can view the surveillance image and perform operations on the remote camera.
The central platform management software on the central server can also implement client access, front-end access, user privilege grading, log query, alarm linkage setting, and voice interaction.
The front-end video server completes the acquisition and encoding of video, audio, alarm and other signals and provides an integrated front-end device for transmission. In addition, the system supports alarm linkage. When the current end generates an alarm, the system automatically pops up the video source cut screen of the alarm according to the alarm linkage setting, and simultaneously performs alarm recording. In the construction of the front-end monitoring points, different transmission modes and erection options are selected according to the actual site environment.
Network selection: The front-end encoding device (digital hard disk recorder) supports IP network access and can be accessed through multiple lines, such as fiber, LAN, ADSL, etc. The construction of the project uses broadband LAN lines to connect the remote storage area to the Internet using the carrier network. On the one hand, the line deployment is timely and convenient. On the other hand, the current line bandwidth can meet the video bandwidth requirements.
Network video monitoring system program three, system function
1, video surveillance
Video and audio collection: Under the premise of ensuring real-time and image quality, the image can reach 4/8/12/16/32 channels of synchronous video and audio due to the mature MPEG4/H.264 image decoding technology. Acquisition, compression, storage, network transmission, playback, standard resolution 352 × 288 maximum resolution up to 704 × 576 real-time, transmission rate can be adaptively changed according to network conditions between 1-25 frames / sec; 60-180M hard disk space (including video and audio) is required, and the bandwidth required for network transmission is adjustable from 64K to 2M.
Multi-screen display: client monitoring video window can be freely switched to select 1, 4, 6, 8, 9, 16, 32, 64 screens with the same screen display; a certain video is enlarged to single screen display; the video display area is displayed full screen ; Arranging the display position of each screen, etc.
Cloud mirror control: Cloud mirror control can realize the left, right, up and down direction of the pan/tilt, automatic patrol; control lens zoom, focus, aperture adjustment; control lighting, wiper and other auxiliary equipment.
Picture quality adjustment: You can adjust the brightness, color, contrast, and saturation of the current video window image;
Picture round robin: The system has a video auto-patrol function, which performs image inspection on all front-end monitoring points within a set interval time. The participating inspection objects can be arbitrarily selected, and the switching interval time can be set.
Preset position: The system can control the definition, storage and recall of the high-speed dome preset position, and can patrol according to the preset sequence, which can realize multi-site remote control quickly.
Subtitle overlay: The location name and time can be superimposed on each image.
Both B/S and C/S mode access are supported.
2, alarm function
Fault alarm: It can identify alarm types such as “device disconnection†and “device connectionâ€, and can output through sound, light and other equipment.
Motion detection alarm: A fixed monitoring area can be selected, the alarm can be automatically recognized and linked, and the sensitivity of the identification can be adjusted arbitrarily.
Alarm input alarm: "temperature", "fire alarm", "smoke", "infrared", "motion detection", "digital input" and other alarm inputs.
The system has the function of receiving the alarm priority. When there is an alarm, the system automatically terminates any other work and gives priority to the alarm information.
The system has alarm check, response confirmation, and review function.
The system has alarm information linkage control function. When one of the alarms has an alarm, the system can trigger corresponding actions according to the rules set in advance, including starting image recording, starting alarm input, sound and light prompting administrator, sending SMS, automatic telephone. Call, pop up live video.
The alarm information can be stored, transmitted, and queried; it can help the public security organs to solve the case in the future.
3, video playback
Video storage: The system provides four recording strategies: timed recording, alarm recording, manual recording and motion detection recording. It can set the compression ratio, frame rate and save time of the recording; support front-end storage, local storage and centralized server storage.
Picture capture: It can realize manual capture, alarm trigger capture image function.
Video search: Video recording can be searched on all monitoring terminals with a user name with search authority. The video search can retrieve video records according to different query conditions such as date, monitoring location and alarm type.
Video playback: The retrieved image records can be played back in actual size or full screen mode, and the playback speed can be played back in normal, fast and slow speed.
The storage time can be set according to the maximum capacity of the system, and the data exceeding the storage time is automatically cycled over time.
4, voice interaction
Voice intercom: The system can support the voice intercom function of the central dispatch center and the sub-station and front-end interaction points. The volume can be adjusted to set the monitor and talkback functions to be turned on and off.
5, data query
Historical video query: Video search can retrieve video records according to different query conditions such as date, monitoring location and alarm type.
Alarm information inquiry: The alarm information can be queried according to the date, monitoring location and other conditions.
Log query: You can query log information such as "front-end connection", "user operation", "node configuration", "user configuration", and "system operation".
Server status query: You can view information such as the running status of the server, disk usage, network communication, and processes.
6, TV wall placement
If the number of monitoring screens far exceeds the number of monitors on the TV wall, the system also provides the function of the TV wall wheel to display all the images of interest on the TV wall in a specified time. The digital matrix in the system provides this function. The digital matrix is ​​responsible for restoring digitally compressed images forwarded by the digital video network management server to analog images, which are displayed on multiple monitors or large screens.
7, system management
User management: maintenance operations such as account opening, modification, deletion, and password modification of multi-user accounts;
Rights management: Multiple levels of management rights such as administrators and general users can be set, and unauthorized users cannot log in to the system.
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