Method for changing record frame rate in digital video recorder and reproducing method therof

The present invention, when directed to a recording frame rate changing method and reproducing method in a digital video recorder, for example, in a digital video recorder (DVR), a motion event (Motion Event) occurs, on the basis of the motion vector in the monitor image , after detecting the subject's movement amount, in accordance with the detected motion amount, a recording frame rate (frame rate) for a variable control to, at the time of recording the monitoring video hard disk or the like, and the monitoring image reproduction, recording frame on the monitor image retrieve rate and, with respect to the recording frame in correspondence to the rate, by variably controlling a playback rate, for the monitored image of the large amount of moving the object recorded at a high frame rate and playback, monitor images of a relatively small object amount of movement, the recording and reproduction in the low frame rate than, a limited number of recording medium such as a hard disk Are able to use capacity more efficiently, it is very useful inventors also being able to further improve the monitoring performance. A digital video recorder, a motion event, a motion vector, motion amount, recording frame rate, frame interval