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: http://graphics.cs.msu.ru/ru/science/research/videoprocessing/stegovideo
Дата изменения: Sun Apr 10 02:18:28 2016 Дата индексирования: Sun Apr 10 02:18:28 2016 Кодировка: UTF-8 |
MSU Graphics & Media Lab (Video Group)
MSU StegoVideo allows to hide any file in a video sequence before compression and extract it after decompression with unknown codec.
When the program was created, different popular codecs were analyzed and an algorithm was chosen which provides the smallest data loss after video compression. Convolutional codes with Viterbi decoding are used to correct arising errors.
The main project goals:
This is an example of extracted info.
# denotes symbol with mistake. In real file you will see any symbol in this place.
Data hiding, a form of Source text |
Data hiding, a form of Source text hidden in a film that was compressed by DivX |
Data##i##ng, a form of Source text hidden in a film that was compressed by DivX |
This is an example of distortions in video with hidden info.
source frame | source frame with hidden info |
compressed frame with hidden info - information was completely recovered!
Quality of information extracted from compressed video depends on codec, data redundancy and frame size. The greater information redundancy, the greater probability of extracting file info without errors. Generally, the algorithm is applicable at bit rates down to 500 kbps.
MSU StegoVideo as independent .exe(ZIP, 129 KB)
MSU StegoVideo as VirtualDub filter(ZIP, 57 KB)
Unpack this file in the folder "Plugins" in VirtualDub directory to use.
Detailed description of MSU StegoVideo on program page
Instructions for using program without VirtualDub
Instructions for using program with VirtualDub
Project lead:
Researchers:
e-mail:
video@graphics.cs.msu.ru