An audio and visual video monitoring and/or alarm system which uses incident analysis, pattern recognition and detection or sub area analysis is disclosed.

摘要

Data processing apparatus comprising a video data receiver configured to receive video data, and an audio data receiver configured to receive audio data. The apparatus further comprises an alarm engine configured to analyse said received video and audio data and generate an alarm signal based on an output signal generated by said analysis. Also disclosed is a method and apparatus for automatically determining the real size of an object in an image and a method and apparatus for using a virtual signal to test an alarm system.