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Security and Digital Recording System

Security and Digital Recording System. Final Presentation. Students: Gadi Marcu, Tomer Alon Number: D1123 Supervisor: Erez Zilber Semester: Spring 2004. Project Goals. Creating a management system for data, originating from: Cameras (Movies).

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Security and Digital Recording System

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  1. Security and Digital Recording System Final Presentation Students: Gadi Marcu, Tomer Alon Number: D1123 Supervisor: Erez Zilber Semester: Spring 2004

  2. Project Goals • Creating a management system for data, originating from: • Cameras (Movies). • Sensors and possibly other devices (Alerts). • This system will enable: • Watching and storing the movies. • On-line response to incoming alerts.

  3. Data Module System’s Modules User Interface Module (Web Server) Communication Module

  4. End Users System’s Modules (cont.)End Users – User Interface System Configuration Data User Interface Module (Web Server)

  5. DEVICES System’s Modules (cont.)Communication Server – Devices Camera Operating Commands Communication Module Camera Frames, Alerts

  6. Data Module System’s Modules (cont.)Communication Server – Data Server Communication Module Cameras operation data, Alerts handling data Movies, Alerts Log

  7. Data Module System’s Modules (cont.)Data Server – User Interface User Interface Module (Web Server) Stored Movies, System Configurations System Configurations, Data Manipulation

  8. System’s Modules (cont.)Communication Server – Web Server User Interface Module (Web Server) Real Time Movies Communication Module Real Time Requests, Messages about changes in cameras configurations

  9. Design Considerations • Generic devices handling • Devices identification by unique ID – sent first when initiating connection • Alerts identification by alert numbers • Standard camera commands

  10. System Considerations • Alerts & camera commands sent over TCP • Movie frames sent over UDP • Quick frames handling • Automatic old movies disposal & smart disposal on critical low disk space

  11. Perfomance Considerations –Cameras Communication • Frames passed to the server in JPEG format. • Frames size is 640x480, around 50KB. • Camera transmitting at 10 fps takes 500KBPS. • Theoretically, on a 100MB network, 200 cameras can send 10 fps concurrently. • In reality each camera in the system contains carries overhead. Various algorithms that run on the server can reduce the system's performance.

  12. Performance Considerations – Films Storage • The size of a frame is around 50KB. • The size of a 20 seconds 5fps DIVX compressed movie is around 1400KB • 80 GB HD can contain 93 hours of uncompressed movies (at 5 fps), or 332 hours of compressed movies (at 5 fps).

  13. Database System’s Architecture End Users Devices Network Adapter Network Adapter Web Server Communication Server

  14. Possible Future Improvements & Extensions • Separate network adapter for communication between data server and communication. • Each server will have another network adapter for other sorts of communication.

  15. Possible Future Improvements & Extensions (cont.) • Using a better compression method than DIVX (such as H.263). • Using a faster HD can improve system performance drastically. • Implementation of the SMS messages feature.

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