... Main Profile,the space-time filter technique makes the code stream lowered 30%5) main stream and extra steam ... . Support IVS(intelligent video analysis system),like perimeter detection,items care, flowmeter, abnormal video signal diagnosis13. DVR,NVR ... Support IVS(intelligent video analysis system), like perimeter detection, items care, flowmeter, abnormal video signal diagnosis.1 Permeter detection ...