Video management system and method for event recording using the same

A video management apparatus for event recording in cooperation with a network camera to transmit a first frame with basic information of video data and a plurality of second frames with changed information of the video data, the video management apparatus comprising:

• a processor;
• a storage medium;
• a buffer configured to store the first frame and the plurality of second frames, and eliminate the stored frames according to an external control signal;
• a buffer controller configured to generate the external control signal at every transmission period for the network camera to transmit the first frame or at every receipt of the first frame;
• an event recorder configured to save the first frame and at least one of the second frames stored in the buffer upon detecting an occurrence of events, which are sensed by sensors to detect changes in the video data, and save frames transmitted from the network camera after the detection of the occurrence of events on the storage medium, thereby recording all video frames both before and after the occurrence of events, thus eliminating any security gaps caused by not recording the video frames stored in the buffer before the occurrence of events;
• and
• a signal distributor configured to direct frames received from the network camera to the buffer, before the detection of the occurrence of events, and direct frames received from the network camera to the event recorder, after the detection of the occurrence of events.