With the continuous development of society, people's living standards have been continuously improved. At the same time, the society has paid special attention to the development of education. The fair, fair, and truthful talent training mechanism is the common goal pursued by all. In recent years, the phenomenon of misconduct and fraud has occurred from time to time in various examinations, and it has become increasingly technical and cryptic. The traditional analog video electronic proctoring system plays a good role as an auxiliary proctor, but more details are not effectively monitored and recorded, and the traditional electronic proctoring system has not been systematically and scientifically managed. Its role has not been fully exerted. How can we build an auxiliary electronic invigilation system that makes talent selection more fair and equitable, and make competition more fair, reasonable, and benign? The timely feedback of examination site information, the accuracy of on-site information collection, and whether all kinds of information can be scientific Whether management, supervisors at all levels can cooperate with supervisors, mutual supervision, and so on are all problems that need to be solved in building such a system.
demand analysis
Implement electronic proctored exams and effectively integrate onsite proctoring and back-end remote networking electronic proctoring.
The system should adopt megapixel-based high-definition network cameras that use standard H.264 encoding to compress high-definition video images at low bit rates. In the examination room, high-definition fixed cameras and dynamic high-definition integrated cameras are deployed to implement fixed-range wide-area monitoring and key dynamic monitoring with the PTZ. The front-end network cameras have two-way audio intercom functions. If necessary, perform on-site monitoring.
Realize the superposition of all kinds of information at the scene, including date, time, location, number of the examination room, superposition of the examination room subjects, superposition of on-site invigilators, and so on. Multiple storage modes enable local storage and centralized storage at the back end, and recording data can be quickly queried based on key index information.
The high-definition network cameras in the examination room should be able to be used as routine teaching monitoring, and even multimedia teaching applications such as teaching courseware recording and remote network teaching. It can also be integrated into the school security video surveillance system for unified management. During the examination, the authority authentication mechanism can be used to separate and complete the electronic invigilation task. The system should have a strict authority review mechanism to ensure the security and confidentiality of the electronic invigilation system. The system should have large-scale networking capabilities and provide multiple levels of access to different network architectures.
Design Principles
The construction of school surveillance HD network video surveillance system will follow the guiding principles of “unified planning, hierarchical construction, territorial management, and resource sharingâ€, using digital video technology and network transmission technology, and proceeding from the school’s digital monitoring requirements to achieve the following objectives.
1, advanced
Using the latest high-definition megapixel network camera, the image resolution reaches HD 720p (1280*720) full real-time, realizing remote high-definition monitoring of all monitoring points. In product design, the design of the entire system software and hardware equipment is in line with the trend of high-tech. The key equipment such as digitalization, compression, decompression and transmission of media are all at the leading international level. Under the premise of meeting current functions, the system design is forward-looking and will maintain a certain degree of technological advancement for a long period of time in the future.
2. Rationality
According to the user's network conditions, tailored monitoring system structure, so that the monitoring system to achieve optimal performance; monitoring system structure and the user's management organization is consistent with the convenience of system management and maintenance. At the same time, when designing the system, fully consider the expansion of system capacity and functions to facilitate system expansion and smooth upgrade.
3, economical
Under the premise of satisfying system functions and performance requirements, the system construction cost should be reduced as much as possible, economical and practical technologies and equipment should be used, and existing equipment and resources should be used to comprehensively consider the construction, upgrade, and maintenance costs of the system.
4, practicality
In equipment selection, based on the actual needs of the situation, combined with the current market share of various products, select the product with the best performance price ratio and expansion capabilities.
5, normative
Control protocols, codec protocols, interface protocols, media file formats, transmission protocols, etc. conform to relevant national standards, industry standards, and technical specifications promulgated by the Ministry of Public Security.
6, can be maintained
The management system is simple in operation, high in practicality, easy to operate and easy to maintain. The system has a professional management and maintenance terminal to facilitate system maintenance. In addition, the system has the functions of self-checking, fault diagnosis, and fault weakening. In the event of a fault, it can be maintained in a timely and rapid manner.
7, can be managed
The system has a professional management terminal, centralized and unified management of system equipment and users, implementation of control and setup of all remote equipment, ensuring that the system performs its management functions in an efficient, orderly and reliable manner.
8, security
The system adopts comprehensive safety protection measures to prevent lightning strikes, overloads, power failures and vandalism, and has a high degree of security and confidentiality.
Overall system architecture
The monitoring system adopts an advanced network video monitoring architecture. The entire network architecture is divided into three layers: access layer, convergence layer, and core layer.
Access layer: Through high-definition megapixel network video surveillance equipment, high-definition access to the front-end monitoring points. The video resolution reaches 720p (1280*720) full real-time.
Convergence layer: It implements the access aggregation of all network monitoring front-end equipment in each branch. At each aggregation point, a sub-control host is set up, and it is configured to realize real-time monitoring, storage and forwarding of all sub-control points.
Core layer: Realize remote centralized monitoring, control, management, and storage of all monitoring front-ends. At the core layer, a central control host is set up to realize real-time monitoring, storage, and forwarding of each sub-control point by accessing each sub-control host.
Structural features
Flexible deployment for smooth capacity expansion: The system architecture is flexible. Based on the current and future system scale, the platform equipment can be deployed flexibly, which saves construction investment and facilitates smooth expansion of the system later.
Hierarchical management: It is possible to install and set up multi-level management servers according to the different management rights, and achieve hierarchical management, control, and storage of the entire monitoring system. The sub-control center can realize centralized monitoring, storage and forwarding of all video monitoring points in the sub-control area. The headquarters monitoring center can realize the real-time image and video data acquisition of each sub-control center.
Hierarchical storage: Through the dedicated large-capacity IP-San storage device built in the sub-control center, centralized storage of recording data of each sub-control point is realized, and the security and reliability of the stored data are ensured. The monitoring data storage time of some production monitoring points is three months, and the video storage time of other units is one month.
demand analysis
Implement electronic proctored exams and effectively integrate onsite proctoring and back-end remote networking electronic proctoring.
The system should adopt megapixel-based high-definition network cameras that use standard H.264 encoding to compress high-definition video images at low bit rates. In the examination room, high-definition fixed cameras and dynamic high-definition integrated cameras are deployed to implement fixed-range wide-area monitoring and key dynamic monitoring with the PTZ. The front-end network cameras have two-way audio intercom functions. If necessary, perform on-site monitoring.
Realize the superposition of all kinds of information at the scene, including date, time, location, number of the examination room, superposition of the examination room subjects, superposition of on-site invigilators, and so on. Multiple storage modes enable local storage and centralized storage at the back end, and recording data can be quickly queried based on key index information.
The high-definition network cameras in the examination room should be able to be used as routine teaching monitoring, and even multimedia teaching applications such as teaching courseware recording and remote network teaching. It can also be integrated into the school security video surveillance system for unified management. During the examination, the authority authentication mechanism can be used to separate and complete the electronic invigilation task. The system should have a strict authority review mechanism to ensure the security and confidentiality of the electronic invigilation system. The system should have large-scale networking capabilities and provide multiple levels of access to different network architectures.
Design Principles
The construction of school surveillance HD network video surveillance system will follow the guiding principles of “unified planning, hierarchical construction, territorial management, and resource sharingâ€, using digital video technology and network transmission technology, and proceeding from the school’s digital monitoring requirements to achieve the following objectives.
1, advanced
Using the latest high-definition megapixel network camera, the image resolution reaches HD 720p (1280*720) full real-time, realizing remote high-definition monitoring of all monitoring points. In product design, the design of the entire system software and hardware equipment is in line with the trend of high-tech. The key equipment such as digitalization, compression, decompression and transmission of media are all at the leading international level. Under the premise of meeting current functions, the system design is forward-looking and will maintain a certain degree of technological advancement for a long period of time in the future.
2. Rationality
According to the user's network conditions, tailored monitoring system structure, so that the monitoring system to achieve optimal performance; monitoring system structure and the user's management organization is consistent with the convenience of system management and maintenance. At the same time, when designing the system, fully consider the expansion of system capacity and functions to facilitate system expansion and smooth upgrade.
3, economical
Under the premise of satisfying system functions and performance requirements, the system construction cost should be reduced as much as possible, economical and practical technologies and equipment should be used, and existing equipment and resources should be used to comprehensively consider the construction, upgrade, and maintenance costs of the system.
4, practicality
In equipment selection, based on the actual needs of the situation, combined with the current market share of various products, select the product with the best performance price ratio and expansion capabilities.
5, normative
Control protocols, codec protocols, interface protocols, media file formats, transmission protocols, etc. conform to relevant national standards, industry standards, and technical specifications promulgated by the Ministry of Public Security.
6, can be maintained
The management system is simple in operation, high in practicality, easy to operate and easy to maintain. The system has a professional management and maintenance terminal to facilitate system maintenance. In addition, the system has the functions of self-checking, fault diagnosis, and fault weakening. In the event of a fault, it can be maintained in a timely and rapid manner.
7, can be managed
The system has a professional management terminal, centralized and unified management of system equipment and users, implementation of control and setup of all remote equipment, ensuring that the system performs its management functions in an efficient, orderly and reliable manner.
8, security
The system adopts comprehensive safety protection measures to prevent lightning strikes, overloads, power failures and vandalism, and has a high degree of security and confidentiality.
Overall system architecture
The monitoring system adopts an advanced network video monitoring architecture. The entire network architecture is divided into three layers: access layer, convergence layer, and core layer.
Access layer: Through high-definition megapixel network video surveillance equipment, high-definition access to the front-end monitoring points. The video resolution reaches 720p (1280*720) full real-time.
Convergence layer: It implements the access aggregation of all network monitoring front-end equipment in each branch. At each aggregation point, a sub-control host is set up, and it is configured to realize real-time monitoring, storage and forwarding of all sub-control points.
Core layer: Realize remote centralized monitoring, control, management, and storage of all monitoring front-ends. At the core layer, a central control host is set up to realize real-time monitoring, storage, and forwarding of each sub-control point by accessing each sub-control host.
Structural features
Flexible deployment for smooth capacity expansion: The system architecture is flexible. Based on the current and future system scale, the platform equipment can be deployed flexibly, which saves construction investment and facilitates smooth expansion of the system later.
Hierarchical management: It is possible to install and set up multi-level management servers according to the different management rights, and achieve hierarchical management, control, and storage of the entire monitoring system. The sub-control center can realize centralized monitoring, storage and forwarding of all video monitoring points in the sub-control area. The headquarters monitoring center can realize the real-time image and video data acquisition of each sub-control center.
Hierarchical storage: Through the dedicated large-capacity IP-San storage device built in the sub-control center, centralized storage of recording data of each sub-control point is realized, and the security and reliability of the stored data are ensured. The monitoring data storage time of some production monitoring points is three months, and the video storage time of other units is one month.
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