A method to protect video from unauthorized reuse.
Publication Date: 2010-Oct-08
The IP.com Prior Art Database
This invention is related to the transmission of video content. A problem with video sharing is how to prevent transmitted video content from being intercepted for future unauthorized reuse. One method is disclosed in this invention about how to prevent the unauthorized re-use of transmitted video content.
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A method to protect video from unauthorized reuse .
Field of the Invention
The present invention relates generally to the transmission of video content. In particular, an embodiment of the present invention relates to preventing the unauthorized re-use of transmitted video content.
As more and more WEB
2.0 applications are available on Internet today, video content is very popular to be shared using web technology, and web user are able to view video content online.
the publisher of the video hopes the video is viewable on web, but not allow it to be downloaded for unauthorized reuse. One possible way to get unauthorized video content is to intercept video data during transmission.
One existing way to protect video copyright is data encryption.
A problem with video sharing is about copyright protection
, transfer to client end, and then are decrypted at client end for playing. It has been shown that, after encrypting video data by means of the known method, cracking the encryption by means of differential attacks by unauthorized third parties could be possible .
Patent US 5,321,748 shows a method to scramble video signals.
Video data are encrypted at server end
A block of video lines in a television raster is divided into top and
bottom sub-block portions. The top and bottom sub-block portions are switched in position.
Patent US 6,535,687 B1 shows another method to scramble video data. Individual image of video is divided into multiple portions, and the portions are rearranged randomly.
The common problem of above patents are, even though the sequences of data portions are scrambled, each video frame still has all data of the frame. By intercepting video frame data, it is possible to re-assemble each frame by re-arrange the portions of the frame.
Accordingly, a need exists for a method to prevent intercepted video data from being reused
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A method of preventing intercepted video data from being reused
, comprising the steps of:
Dividing video content into multiple streams, each stream carries only partial data of each frame of the original video. Dividing metadata into pieces and inserting metadata into single or multiple streams,
which is used for video
Transmitting said multiple video streams to receiver. Re-assembling video content at receiver.
2. The method of claim 1,
wherein the step of dividing video content includes dividing single frame picture into multiple
random shape sub-pictures.
3. The method of claim 1,
wherein said piece of metadata is used for re
-assemble of a series of frames, and varying
number of frames of said streams.
4. The method of claim 1,
wherein the step of inserting metadata into stream includes inserting metadata into the place
after said series of frames.
5. The method of claim 1,
wherein the step of re-assembling video content includes extracting sub
-pictures of each frame
from multiple streams.
6. The method of claim 1,