IEEE Trans Image Process - Frame-Based Recovery of Corrupted Video Files Using Video Codec Specifications.

Tópicos

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Resumo

In digital forensics, recovery of a damaged or altered video file plays a crucial role in searching for evidences to resolve a criminal case. This paper presents a frame-based recovery technique of a corrupted video file using the specifications of a codec used to encode the video data. A video frame is the minimum meaningful unit of video data. Many existing approaches attempt to recover a video file using file structure rather than frame structure. In case a target video file is severely fragmented or even has a portion of video overwritten by other video content, however, video file recovery of existing approaches may fail. The proposed approach addresses how to extract video frames from a portion of video to be restored as well as how to connect extracted video frames together according to the codec specifications. Experiment results show that the proposed technique successfully restores fragmented video files regardless of the amount of fragmentations. For a corrupted video file containing overwritten segments, the proposed technique can recover most of the video content in non-overwritten segments of the video file.

Resumo Limpo

digit forens recoveri damag alter video file play crucial role search evid resolv crimin case paper present framebas recoveri techniqu corrupt video file use specif codec use encod video data video frame minimum meaning unit video data mani exist approach attempt recov video file use file structur rather frame structur case target video file sever fragment even portion video overwritten video content howev video file recoveri exist approach may fail propos approach address extract video frame portion video restor well connect extract video frame togeth accord codec specif experi result show propos techniqu success restor fragment video file regardless amount fragment corrupt video file contain overwritten segment propos techniqu can recov video content nonoverwritten segment video file

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