Patent ID: 9740776
Date: 2017-08-22
CPC Classifications: G06F

Claim:
1. A method for extracting residual videos and deleted videos in a DVR hard disk, characterized in that comprising the steps of: 1) 2) 3) If the residual videos are to be extracted, parsing clusters in the DVR hard disk one by one to find the free area beyond the overwritten area, wherein the residual videos stored in the sectors will be parsed on their stream header information; if the deleted videos are to be extracted, parsing sectors one by one to find the sectors identified with delete tag, wherein the videos will be parsed on their stream header information; Comparing video files with respect to their time period and channel number based on the specific tags of their video stream header information, wherein if the video files have the same channel number and the same time period with each other, the parsing will go to the next sector with a specific tag; however, if the channel number is not the same or the time period exceeds the specified range, the video data of last parsed sector shall be captured and recorded; 4) 5)